CN107564944B - Organic light emitting display panel and display device - Google Patents
Organic light emitting display panel and display device Download PDFInfo
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- CN107564944B CN107564944B CN201710759322.8A CN201710759322A CN107564944B CN 107564944 B CN107564944 B CN 107564944B CN 201710759322 A CN201710759322 A CN 201710759322A CN 107564944 B CN107564944 B CN 107564944B
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Abstract
The invention relates to the technical field of display, in particular to an organic light-emitting display panel and a display device. The organic light emitting display panel includes: a substrate; a first electrode; the organic layer comprises a first light-emitting layer and a second light-emitting layer which are mutually overlapped in the direction vertical to the substrate, and the light rays emitted by the first light-emitting layer and the second light-emitting layer are mixed into white light; the second electrode is positioned on one side of the organic layer, which is far away from the substrate; a third electrode between the first light emitting layer and the second light emitting layer; the organic light-emitting display panel comprises first sub-pixels, second sub-pixels and third sub-pixels which are arranged in an array mode, in the light emitting direction of the organic light-emitting display panel, the first sub-pixels correspond to the first color filters, the second sub-pixels correspond to the second color filters, and the projection of the third electrodes in the direction perpendicular to the substrate covers the projection of light emitting areas of the third sub-pixels. The scheme can reduce the color cast of the organic light-emitting display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to an organic light-emitting display panel and a display device.
Background
With the continuous upgrade of display technology, the organic light emitting display panel is more and more widely applied. When designing the structure of the organic light emitting display panel, in order to realize full-color display, the following two methods are currently used:
first, light emitting parts capable of emitting different colors are provided. For example, the organic light emitting display panel may include a red light emitting portion, a green light emitting portion, and a blue light emitting portion, which are arranged side by side and respectively emit red light, green light, and blue light, and may eventually implement full color display.
Second, a white light emitting portion is provided, and filters that allow light to pass therethrough are arranged in the light emitting direction of the white light emitting portion in different colors, thereby realizing full-color display.
However, in the first method, a plurality of masks are required to manufacture the organic light emitting display panel, and in the second method, the number of masks required to be used is reduced, but the white light emitting part is of an integral structure and has a long microcavity, which results in a large color shift of the organic light emitting display panel and is not beneficial to realizing wide-viewing-angle display of the organic light emitting display panel.
Disclosure of Invention
The invention provides an organic light-emitting display panel and a display device, which are used for reducing the number of masks for manufacturing the organic light-emitting display panel and reducing the color cast of the organic light-emitting display panel.
A first aspect of the present invention provides an organic light emitting display panel, comprising:
a substrate, a first electrode and a second electrode,
a first electrode on the substrate;
the organic layer is positioned on one side, away from the substrate, of the first electrode and comprises a first light-emitting layer and a second light-emitting layer, the first light-emitting layer and the second light-emitting layer are mutually overlapped in a direction perpendicular to the substrate, and light rays emitted by the first light-emitting layer and the second light-emitting layer are mixed into white light;
the second electrode is positioned on one side, away from the substrate, of the organic layer;
a third electrode between the first light emitting layer and the second light emitting layer;
the organic light-emitting display panel comprises first sub-pixels, second sub-pixels and third sub-pixels which are arranged in an array mode, in the light emitting direction of the organic light-emitting display panel, the first sub-pixels correspond to first color filters, the second sub-pixels correspond to second color filters, and the projection of the third electrodes in the direction perpendicular to the substrate covers the projection of light emitting areas of the third sub-pixels.
Optionally, the first light-emitting layer includes at least two light-emitting materials, each of the light-emitting materials emits light with a different color, and each of the light-emitting materials emits light with a different color from that of the light emitted by the second light-emitting layer.
Optionally, the first light emitting layer comprises a red light emitting material and a green light emitting material.
Optionally, the first light emitting layer includes a first sub light emitting layer and a second sub light emitting layer, and the first sub light emitting layer and the second sub light emitting layer are stacked in a direction perpendicular to the substrate.
Optionally, the first sub-light emitting layer and the second sub-light emitting layer are attached to each other.
Optionally, the second light emitting layer is located on a side of the first light emitting layer facing away from the substrate.
Optionally, the first sub-light emitting layer is a red light emitting layer, the second sub-light emitting layer is a green light emitting layer, and the second light emitting layer is a blue light emitting layer;
the first color filter is a red color filter and the second color filter is a green color filter.
Optionally, the potentials received by the first electrode and the third electrode are equal.
Alternatively,
the thickness of the first light-emitting layer is 5-80 nm, and/or
The thickness of the second light-emitting layer is 5-60 nm, and/or
The thickness of the second electrode is 5-40 nm, and/or
The thickness of the third electrode is 50 to 200nm,
wherein the thickness is in a direction perpendicular to the substrate.
Optionally, the third electrode is a total reflection layer, and the third electrode includes a first ITO layer, a silver layer, and a second ITO layer, which are stacked in a direction perpendicular to the substrate.
A second aspect of the present invention provides a display device including the organic light emitting display panel described in any one of the above.
The technical scheme provided by the invention can achieve the following beneficial effects:
in the organic light-emitting display panel provided by the invention, the first light-emitting layer and the second light-emitting layer are arranged in a layered manner, light rays emitted by the first light-emitting layer and the second light-emitting layer are mixed into white light, the third electrode is positioned between the first light-emitting layer and the second light-emitting layer, covers the light-emitting area of the third sub-pixel in the direction vertical to the substrate, is provided with the first color filter corresponding to the first sub-pixel, and corresponds to the second color filter corresponding to the second sub-pixel. After the arrangement, the first color and the second color can be emitted through the filtering action of the first color filter and the second color filter, and the light-emitting area of the third sub-pixel emits the third color, so that the organic light-emitting display panel can realize full-color display. Because the first light-emitting layer and the second light-emitting layer in the organic light-emitting display panel are arranged in a stacked manner, the number of mask plates required for manufacturing the organic light-emitting display panel is reduced; meanwhile, the third electrodes can be independently arranged, so that the cavity length of the micro-cavity of the third sub-pixel can be independently adjusted, and the cavity length of the third sub-pixel is independently adjusted because the wavelength of the color corresponding to the third sub-pixel is different from the wavelength of the color corresponding to the first sub-pixel and the second sub-pixel, so that the cavity length of the micro-cavity of the third sub-pixel can be in a range more favorable for light emission, and the color cast problem of the organic light-emitting display panel is prevented.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
Fig. 1 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 2 is a partial cross-sectional view of the organic light emitting display panel shown in fig. 1;
FIG. 3 is a partial cross-sectional view of the organic light emitting display panel shown in FIG. 1 in another embodiment;
FIG. 4 is a partial cross-sectional view of the organic light emitting display panel shown in FIG. 1 in a further embodiment;
fig. 5 is a partial cross-sectional view of the organic light emitting display panel shown in fig. 1 according to still another embodiment.
100-organic light emitting display panel;
110-a substrate;
120-a first electrode;
130-a first light emitting layer;
131-a first sub-emissive layer;
132-a second sub-emissive layer;
140-a second luminescent layer;
150-a second electrode;
160-a third electrode;
161-a first ITO layer;
162-silver layer;
163-a second ITO layer;
170-a first color filter;
180-a second color filter;
191-a first common layer;
192-a second common layer;
193-a third common layer;
194-an encapsulation layer;
195-an additional layer.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship, the layer thicknesses of some parts are exaggerated in a drawing manner for easy understanding, and the layer thicknesses in the drawings do not represent the proportional relationship of the actual layer thicknesses.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The following description is of the preferred embodiment for carrying out the invention and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings. The thicknesses and shapes of the respective components in the drawings do not reflect the true scale of the display device, and are merely intended to schematically illustrate the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
An embodiment of the present invention provides an organic light emitting display panel, as shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of the organic light emitting display panel provided in the embodiment of the present invention, fig. 2 is a partial cross-sectional view of the organic light emitting display panel shown in fig. 1, and the organic light emitting display panel 100 includes:
the substrate 110 is formed by a plurality of substrates,
a first electrode 120 on the substrate 110;
the organic layer is positioned on the side of the first electrode 120 away from the substrate 110, and includes a first light emitting layer 130 and a second light emitting layer 140, the first light emitting layer 130 and the second light emitting layer 140 are mutually overlapped in a direction perpendicular to the substrate 110, and light rays emitted by the first light emitting layer 130 and the second light emitting layer 140 are mixed into white light;
a second electrode 150 on a side of the organic layer facing away from the substrate 110;
a third electrode 160, the third electrode 160 being positioned between the first light emitting layer 130 and the second light emitting layer 140;
the organic light emitting display panel 100 includes a first sub-pixel P1, a second sub-pixel P2, and a third sub-pixel P3 arranged in an array, in a light emitting direction of the organic light emitting display panel 100, the first sub-pixel P1 corresponds to the first color filter 170, the second sub-pixel P2 corresponds to the second color filter 180, and a projection of the third electrode 160 in a direction perpendicular to the substrate 110 covers a projection of a light emitting region of the third sub-pixel P3.
When the organic light emitting display panel is used, the first light emitting layer 130 and the second light emitting layer 140 may mix to emit white light, and through the filtering action of the first color filter 170 and the second color filter 180, the first color may be emitted on the light emitting side of the first color filter 170, the second color may be emitted on the light emitting side of the second color filter 180, and the light emitting region of the third sub-pixel P3 emits the third color, so that the organic light emitting display panel may perform full-color display. Because the first light emitting layer 130 and the second light emitting layer 140 in the organic light emitting display panel are stacked, the number of masks required to be used for manufacturing the organic light emitting display panel is reduced, even only one mask is required; meanwhile, the third electrodes 160 may be independently disposed, that is, the cavity length of the microcavity corresponding to the third electrodes 160 may be independently adjusted, and since the wavelength of the color corresponding to the third sub-pixel P3 is different from the wavelength of the color corresponding to the first sub-pixel P1 and the second sub-pixel P2, the cavity length of the third sub-pixel P3 is independently adjusted, so that the cavity length of the microcavity of the third sub-pixel P3 is in a range more favorable for light emission, thereby preventing the color cast problem of the organic light emitting display panel.
The first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 may constitute a pixel unit, and the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 may be configured to emit red light, green light, and blue light, respectively. Of course, more sub-pixels may be added so that each sub-pixel can emit light by mixing more than three colors.
The substrate 110 may be a base for disposing other components in the organic light emitting display panel, and the substrate 110 may be an array substrate in which a plurality of thin film transistors are disposed in an array.
The first electrode 120 may be used as an anode, which may be electrically connected to a thin film transistor in the substrate 110, so that the state of the first electrode 120 is controlled by the thin film transistor; it is understood that the first sub-pixel P1 may correspond to one first electrode 120, and the second sub-pixel P2 may correspond to another first electrode 120, so as to achieve independent control of different first electrodes 120.
Specifically, the first light emitting layer 130 may emit at least two kinds of light, and the second light emitting layer 140 may emit at least one kind of light, and the light emitted by the mixture of the two kinds of light is white light. Here, the first light emitting layer 130 may be located on a side of the second light emitting layer 140 away from the substrate 110, or the second light emitting layer 140 may be located on a side of the first light emitting layer 130 away from the substrate 110.
The second electrode 150 may serve as a cathode of the organic light emitting display panel, which may be disposed over the entire surface, that is, the second electrode 150 may be a unitary structure, which may substantially cover the substrate 110 in a direction perpendicular to the substrate 110. The second electrode 150 and the first electrode 120 may form an electric field, and the first light emitting layer 130 and the second light emitting layer 140 located therebetween may emit light under the action of the electric field.
The third electrode 160 may serve as an anode, and an electric field may be formed between the third electrode and the second electrode 150, and the first light emitting layer 130 or the second light emitting layer 140 located therebetween may emit light under the action of the electric field.
The first color filter 170 may correspond to the first sub-pixel P1, and the second color filter 180 corresponds to the second sub-pixel P2. Specifically, in a direction perpendicular to the substrate 110, the first color filter 170 may be directly opposite to one first electrode 120, and the second color filter 180 may be directly opposite to the other first electrode 120. Also, the projection of the third electrode 160 in the direction perpendicular to the substrate 110 covers the projection of the light emitting region of the third subpixel P3.
For convenience of description, the second light emitting layer 140 is disposed on a side of the first light emitting layer 130 away from the substrate 110, which is taken as an example for the following description, and it should be noted that the technical solution included in the present invention is not limited thereto.
In order to achieve the necessary insulation between the film layers and the light emission of the light emitting layers, the organic light emitting display panel provided by the embodiment of the invention may further include:
a first common layer 191 disposed on the first electrodes 120, the first common layer 191 covering the two first electrodes 120 to separate the first electrodes 120 from the first light emitting layer 130; the first common layer 191 may be a hole transport layer, which may employ a hole transport material to transport holes on the first electrode 120 to the first light emitting layer 130;
a second common layer 192 disposed on the third electrode 160, the second common layer 192 covering the third electrode 160 to separate the third electrode 160 from the second light emitting layer 140, the second common layer 192 being made of an insulating material; the second common layer 192 may be a charge generation layer divided into a P-type layer and an N-type layer, which generate electrons and holes, respectively, the generated electrons are transferred to the first light emitting layer 130, and the generated holes are transferred to the second light emitting layer 140;
a third common layer 193 disposed between the second light emitting layer 140 and the second electrode 150, wherein the third common layer 193 may be an electron transport layer, which may use an electron transport material to transport electrons on the second electrode 150 to the second light emitting layer 140.
In addition, in order to assist in enhancing the transmittance, an encapsulation layer 194 may be further disposed on a side of the second electrode 150 facing away from the substrate 110. The first color filter 170 and the second color filter 180 may be disposed on a side of the encapsulation layer 194 away from the substrate 110.
The first common layer 191, the second common layer 192, the third common layer 193, and the encapsulation layer 194 may be made of an organic material, an inorganic material, or a mixture of an organic material and an inorganic material.
In addition, after the organic light emitting display panel is adopted, the color filters only need to be arranged corresponding to two colors, and the color filters do not need to be arranged corresponding to the third color, so that the influence of the color filters on the light output quantity is relieved, namely, the light output quantity of the organic light emitting display panel is higher.
In an alternative embodiment, the first light-emitting layer 130 may include at least two light-emitting materials, each light-emitting material emits light with a different color, and each light-emitting material emits light with a different color from the second light-emitting layer. That is, the first light emitting layer 130 may be a structure formed by doping different light emitting materials, and light emitted from each of the light emitting materials can be mixed with light emitted from the second light emitting layer 140 to finally form white light. By adopting the structure doped with different materials, the number of film layers of the whole organic light-emitting display panel can be reduced, and the thinning of the organic light-emitting display panel is further facilitated.
Alternatively, the first light emitting layer 130 may specifically include a red light emitting material and a green light emitting material. Correspondingly, the second light emitting layer 140 may be a blue light emitting layer. Of course, the first light emitting layer 130 may include other light emitting materials in addition to the red light emitting material and the green light emitting material, and the second light emitting layer 140 may include a plurality of materials that can emit different lights as long as the first light emitting layer 130 and the second light emitting layer 140 can be mixed to emit white light. In addition, the various light-emitting materials mentioned here may be fluorescent light-emitting materials or phosphorescent light-emitting materials. Further, the red light emitting material and the green light emitting material may be phosphorescent light emitting materials, and the blue light emitting layer may be fluorescent light emitting materials.
In the above embodiment, the second light-emitting layer 140 is a blue light-emitting layer, and in the direction perpendicular to the substrate 110, the distance between the first electrode 120 and the second electrode 150 is greater than the distance between the third electrode 160 and the second electrode 150, the microcavity length of blue light is shorter than the microcavity length of red light and green light, and the wavelength of blue light is shorter than the wavelength of red light and green light, so that the microcavity length of the blue light-emitting layer is shortened, the blue light can be in a better light-emitting state (e.g., higher luminance), and the color shift problem is not likely to occur even in a large viewing angle.
In another embodiment, unlike the embodiment in which the first light emitting layer 130 is formed by doping of a plurality of light emitting materials, the first light emitting layer 130 may also include a plurality of sub-layers. Specifically, as shown in fig. 3, fig. 3 is a partial cross-sectional view of the organic light emitting display panel shown in fig. 1 in another embodiment, the first light emitting layer 130 may include a first sub-light emitting layer 131 and a second sub-light emitting layer 132, and the first sub-light emitting layer 131 and the second sub-light emitting layer 132 are stacked in a direction perpendicular to the substrate 110. In this case, the first sub-luminescent layer 131 may be made of a luminescent material, and the second sub-luminescent layer 132 may be made of a material, and when they are stacked, light emitted from the first sub-luminescent layer 131 and the second sub-luminescent layer 140 may be mixed with each other. In the first light emitting layer 130, the light emitted by the first sub-light emitting layer 131 and the light emitted by the second sub-light emitting layer 132 are more uniform, so that the light emitted by the first sub-light emitting layer 131 and the light emitted by the second light emitting layer 140 after being mixed is more uniform, and the brightness of the organic light emitting display panel is more uniform.
In one embodiment, the first sub-emitting layer 131 and the second sub-emitting layer 132 may be attached to each other, i.e., the structure shown in fig. 3. In another embodiment, as shown in fig. 4, an additional layer 195 may be disposed between the first sub-emitting layer 131 and the second sub-emitting layer 132, and the additional layer 195 may be a charge generation layer, which may be divided into a P-type layer and an N-type layer, which respectively generate electrons and holes, and the generated electrons are transported to the first sub-emitting layer 131 and the generated holes are transported to the second sub-emitting layer 132.
The second light-emitting layer 140 may be a light-emitting layer emitting only one color, the second light-emitting layer 140 may be disposed between the first light-emitting layer 130 and the substrate 110, or the second light-emitting layer 140 may be located on a side of the first light-emitting layer 130 away from the substrate 110. When the second light-emitting layer 140 is located on the side of the first light-emitting layer 130 away from the substrate 110, even if the second light-emitting layer 140 covers the entire first light-emitting layer 130, due to the shielding effect of the third electrode 160, the portion of the second light-emitting layer 140 overlapping with the third electrode 160 does not mix with the second light-emitting layer 140 for emitting light, and therefore, the portion of the second light-emitting layer 140 overlapping with the third electrode 160 can directly emit desired monochromatic light without providing a color filter. As can be seen, this embodiment may allow the first light emitting layer 130 to be disposed in a simpler shape, and it is not necessary to dispose a corresponding pattern on the first light emitting layer 130 according to the light emitting requirement of the second light emitting layer 140, so this embodiment may simplify the process of the organic light emitting display panel.
In one embodiment, the first sub-emitting layer 131 may be a red emitting layer, the second sub-emitting layer 132 may be a green emitting layer, and the second emitting layer 140 may be a blue emitting layer. Correspondingly, the first color filter 170 may be a red color filter that allows only red light to pass, thereby obtaining red light; the second color filter 180 may be a green color filter that allows only green light to pass, and thus green light.
When the first electrode 120 and the third electrode 160 are disposed at the same positions as described in the above embodiment, in order to better drive the organic layer to emit light, the polarities of the electrical signals received by the first electrode 120 and the third electrode 160 may be the same. For example, the voltages applied to the first electrode 120 and the third electrode 160 are both positive voltages, or both negative voltages. Further, the potentials received by the first electrode 120 and the third electrode 160 may be made equal. At this time, the first electrode 120 and the third electrode 160 may be connected to the same power line, thereby simplifying the structure of the organic light emitting display panel and simplifying the manufacturing process thereof.
In an alternative embodiment, as shown in fig. 5, fig. 5 is a partial cross-sectional view of the organic light emitting display panel shown in fig. 1 in yet another embodiment, the third electrode 160 may be a total reflection layer, which may specifically include a first ITO (Indium tin oxide) layer 161, a silver layer 162, and a second ITO layer 163, which are stacked in a direction perpendicular to the substrate 110. Because indium tin oxide has better conductivity, and silver has better conductivity and light reflection rate, the laminated structure formed by combining the indium tin oxide and the silver has better conductivity and higher light reflection rate, and the organic light-emitting display panel can better emit light.
It is understood that the thickness of each film layer of the organic light emitting display panel will directly affect the cavity length of the optical microcavity of each film layer, and in an alternative embodiment, the thickness of each film layer of the organic light emitting display panel may be set to obtain a more ideal cavity length. Here, the thickness is in a direction perpendicular to the substrate 110. Specifically, the method comprises the following steps:
the thickness of the first light-emitting layer 130 is 5 to 80nm, and/or
The thickness of the second light emitting layer 140 is 5 to 60nm, and/or
The second electrode 150 has a thickness of 5 to 40nm, and/or
The thickness of the third electrode 160 is 50 to 200nm, and/or
The thickness of the first common layer 191 is 60 to 240nm, and/or
The second common layer 192 has a thickness of 0 to 120nm, and/or
The third common layer 193 has a thickness of 15 to 90nm, and/or
The thickness of the encapsulation layer 194 is 20 to 180 nm.
The cavity length of the micro-cavity corresponding to each film layer can be adjusted by flexibly selecting the thickness of each film layer.
Based on the organic light emitting display panel, an embodiment of the present invention further provides a display device, which may include the organic light emitting display panel described in any of the embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, 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 invention should be included in the protection scope of the present invention.
Claims (8)
1. An organic light emitting display panel, comprising:
a substrate, a first electrode and a second electrode,
a first electrode on the substrate;
the organic layer is positioned on one side, away from the substrate, of the first electrode and comprises a first light-emitting layer and a second light-emitting layer, the first light-emitting layer and the second light-emitting layer are mutually overlapped in a direction perpendicular to the substrate, and light rays emitted by the first light-emitting layer and the second light-emitting layer are mixed into white light;
the second electrode is positioned on one side, away from the substrate, of the organic layer;
a third electrode between the first light emitting layer and the second light emitting layer;
the organic light-emitting display panel comprises first sub-pixels, second sub-pixels and third sub-pixels which are arranged in an array mode, in the light emitting direction of the organic light-emitting display panel, the first sub-pixels correspond to first color filters, the second sub-pixels correspond to second color filters, and the projection of the third electrodes in the direction perpendicular to the substrate covers the projection of light emitting areas of the third sub-pixels; wherein the content of the first and second substances,
the second light-emitting layer is located on a side of the first light-emitting layer away from the substrate, the first light-emitting layer and the second light-emitting layer are located between the first electrode and the second electrode, the first light-emitting layer and the second light-emitting layer in the first sub-pixel and the second sub-pixel emit light under the drive of a voltage between the first electrode and the second electrode, and the first light-emitting layer and the second light-emitting layer in the first sub-pixel and the second sub-pixel emit light under the drive of a voltage between the first electrode
The second light-emitting layer is positioned between the third electrode and the second electrode, and the second light-emitting layer in the third sub-pixel emits light under the drive of voltage between the third electrode and the second electrode;
the potentials received by the first electrode and the third electrode are equal;
the first color filter is a red color filter, the second color filter is a green color filter, the second light-emitting layer is a blue light-emitting layer, and the distance between the first electrode and the second electrode is greater than the distance between the third electrode and the second electrode.
2. The organic light-emitting display panel according to claim 1, wherein the first light-emitting layer includes at least two light-emitting materials, each of the light-emitting materials emits light of a different color, and each of the light-emitting materials emits light of a different color from the light emitted by the second light-emitting layer.
3. The organic light-emitting display panel according to claim 2, wherein the first light-emitting layer comprises a red light-emitting material and a green light-emitting material.
4. The organic light-emitting display panel according to claim 1, wherein the first light-emitting layer includes a first sub light-emitting layer and a second sub light-emitting layer, and the first sub light-emitting layer and the second sub light-emitting layer are stacked in a direction perpendicular to the substrate.
5. The organic light-emitting display panel according to claim 4, wherein the first sub light-emitting layer is a red light-emitting layer, and the second sub light-emitting layer is a green light-emitting layer.
6. The organic light-emitting display panel according to claim 1,
the thickness of the first light-emitting layer is 5-80 nm, and/or
The thickness of the second light-emitting layer is 5-60 nm, and/or
The thickness of the second electrode is 5-40 nm, and/or
The thickness of the third electrode is 50 to 200nm,
wherein the thickness is in a direction perpendicular to the substrate.
7. The organic light-emitting display panel according to claim 1, wherein the third electrode is a total reflection layer, and the third electrode comprises a first ITO layer, a silver layer, and a second ITO layer, which are stacked in a direction perpendicular to the substrate.
8. A display device characterized by comprising the organic light-emitting display panel according to any one of claims 1 to 7.
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| KR102113149B1 (en) * | 2012-12-28 | 2020-05-20 | 엘지디스플레이 주식회사 | Organic light emitting element, organic light emitting display device and method for manufacturing the same |
| CN104617226B (en) * | 2015-02-28 | 2016-10-05 | 京东方科技集团股份有限公司 | A kind of array base palte and preparation method thereof, display device and display compensation method |
| KR102406606B1 (en) * | 2015-10-08 | 2022-06-09 | 삼성디스플레이 주식회사 | Organic light emitting device, organic light emitting display device having the same and fabricating method of the same |
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| CN105489632A (en) * | 2016-01-15 | 2016-04-13 | 京东方科技集团股份有限公司 | Organic light-emitting diode (OLED) array substrate, manufacturing method thereof, OLED display panel and OLED display device |
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