CN115835700A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN115835700A CN115835700A CN202211615477.1A CN202211615477A CN115835700A CN 115835700 A CN115835700 A CN 115835700A CN 202211615477 A CN202211615477 A CN 202211615477A CN 115835700 A CN115835700 A CN 115835700A
- Authority
- CN
- China
- Prior art keywords
- sub
- layer
- pixel
- color
- functional
- 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
Links
Images
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display panel and a display device, which comprise a substrate and a plurality of sub-pixels arranged on the substrate, wherein each sub-pixel comprises a light emitting layer and a functional layer which are arranged in a laminated mode, each functional layer comprises at least one sub-layer, each sub-pixel comprises at least two colors of sub-pixels, the number and/or the thickness of the sub-layers of the functional layers of the sub-pixels of at least one color are different from those of the functional layers of the sub-pixels of other colors, so that the accumulated position of a current carrier interface of the functional layers of the sub-pixels of at least one color can be adjusted by adjusting the number and/or the thickness of the sub-layers of the functional layers of the sub-pixels of at least one color, the capacitance of the sub-pixels of at least one color can be adjusted, the lighting speed of the sub-pixels of at least one color can be adjusted, the lighting speeds of the sub-pixels of different colors tend to be consistent, and the problem of color cast of the display panel can be alleviated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
An OLED (Organic Light-Emitting Diode) Display device is widely used in many fields as a new generation of mainstream Display device behind an LCD (Liquid Crystal Display). However, when the current OLED display panel switches the screen under the low-brightness scene, the phenomenon of smear color shift occurs, which affects the display effect of the OLED display device.
Disclosure of Invention
The invention provides a display panel and a display device, which aim to solve the problem that an OLED display panel has smear color cast when a picture is switched under a low-brightness scene.
In a first aspect, the present invention provides a display panel, including a substrate and a plurality of sub-pixels disposed on the substrate, wherein the sub-pixels include a light-emitting layer and a functional layer disposed in a stacked manner, and the functional layer includes at least one sub-layer;
the plurality of sub-pixels comprise sub-pixels of at least two colors, wherein the number of sub-layers of the functional layer of the sub-pixel of at least one color is different from the number of sub-layers of the functional layers of the sub-pixels of other colors, so that the accumulated position of the carrier interface of the functional layer in the sub-pixel of at least one color is different from the accumulated position of the carrier interface of the functional layer in the sub-pixels of other colors.
Optionally, a thickness of a sub-layer of the functional layer close to the light emitting layer in at least one color sub-pixel is different from a thickness of a sub-layer of the functional layer close to the light emitting layer in at least one other color sub-pixel.
Optionally, the energy level of the material of the sub-layer of the functional layer close to the light emitting layer in the sub-pixel of at least one color is different from the energy level of the material of the sub-layer of the functional layer close to the light emitting layer in the sub-pixel of at least one other color.
Optionally, the at least two color sub-pixels comprise a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel;
the functional layer of the first color sub-pixel comprises a first sub-layer; the functional layer of the second color sub-pixel comprises a second sub-layer; the functional layer of the third color sub-pixel comprises a third sub-layer and a fourth sub-layer which are sequentially stacked on the substrate;
a thickness of the third sub-layer is different from a thickness of the first sub-layer and the second sub-layer; and/or the material energy level of the third sub-layer is different from the material energy levels of the first sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
Optionally, the first sublayer, the second sublayer and the fourth sublayer are a common layer, and the third sublayer is located on one side of the common layer close to the light emitting layer.
Optionally, the at least two color sub-pixels include a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the functional layer of the first color sub-pixel includes a first sub-layer, the functional layer of the second color sub-pixel includes a second sub-layer and a third sub-layer that are sequentially stacked on the substrate, and the functional layer of the third color sub-pixel includes a fourth sub-layer and a fifth sub-layer that are sequentially stacked on the substrate;
the thickness of the first sub-layer is different from the thickness of the fourth sub-layer and the second sub-layer; and/or the material energy level of the first sub-layer is different from the material energy levels of the fourth sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
Optionally, the first sublayer, the third sublayer and the fifth sublayer are a first common layer, the second sublayer and the fourth sublayer are a second common layer, and the second common layer is located on one side of the first common layer close to the light emitting layer.
Preferably, the at least two color sub-pixels include a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, the functional layer of the first color sub-pixel includes a first sub-layer, the functional layer of the second color sub-pixel includes a second sub-layer and a third sub-layer which are sequentially stacked on the substrate, and the functional layer of the third color sub-pixel includes a fourth sub-layer, a fifth sub-layer and a sixth sub-layer which are sequentially stacked on the substrate;
a thickness of the fourth sublayer is different from a thickness of the first sublayer and the second sublayer; and/or the material energy level of the fourth sub-layer is different from the material energy levels of the first sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
Preferably, the first sublayer, the third sublayer and the sixth sublayer are a first common layer, the second sublayer and the fifth sublayer are a second common layer, the second common layer is located on one side of the first common layer close to the light-emitting layer, and the fourth sublayer is located on one side of the second common layer close to the light-emitting layer.
In a second aspect, the invention provides a display device comprising a display panel as described in any one of the above.
The display panel comprises a substrate and a plurality of sub-pixels arranged on the substrate, wherein each sub-pixel comprises a light emitting layer and a functional layer which are arranged in a stacked mode, each functional layer comprises at least one sub-layer, each sub-pixel comprises at least two colors of sub-pixels, the number of the sub-layers of the functional layer of the sub-pixel of at least one color is different from that of the functional layers of the sub-pixels of other colors, so that the accumulated position of the carrier interfaces of the functional layers in the sub-pixels of at least one color is different from that of the carrier interfaces of the functional layers in the sub-pixels of other colors, the accumulated position of the carrier interfaces of the functional layers of the sub-pixels of at least one color can be adjusted by adjusting the number of the sub-layers of the functional layers of the sub-pixels of at least one color, the capacitance of the sub-pixels of at least one color can be adjusted, the lighting speed of the sub-pixels of at least one color can be adjusted, the lighting speeds of the sub-pixels of different colors can be further enabled to be consistent, and the color cast problem of the display panel can be relieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.
Fig. 1 is a schematic plan view illustrating a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the display panel shown in FIG. 1 along a cutting line AA';
fig. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the invention;
fig. 4 is a schematic structural view of a light-emitting layer and a functional layer provided in an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a display panel according to another embodiment of the invention;
FIG. 6 is a schematic structural diagram of a light-emitting layer and a functional layer provided in accordance with another embodiment of the present invention;
fig. 7 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 8 is a schematic structural view of a light-emitting layer and a functional layer provided in another embodiment of the present invention;
fig. 9 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
fig. 10 is a schematic structural view of a light-emitting layer and a functional layer provided in another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the conventional OLED display panel, at least two color sub-pixels are included, such as a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Because the luminescent materials of the sub-pixels with different colors are different and the electrical characteristics of the different luminescent materials are also different, under the same starting voltage, the starting speeds of the sub-pixels with different colors are different, so that when a picture is switched under a low-brightness scene, residual color mixing can occur at the joint edge of brightness and darkness of the picture, the problem of smear color cast of a display panel is caused, and the display effect of a display device is influenced.
Based on the above, the present invention discloses a display panel, wherein the number of sublayers of the functional layer of the sub-pixel of at least one color is different from the number of sublayers of the functional layer of the sub-pixel of other colors, so that the accumulated position of the carrier interface of the functional layer in the sub-pixel of at least one color is different from the accumulated position of the carrier interface of the functional layer in the sub-pixel of other colors, thereby alleviating the problem of smear color cast of the display panel.
As an optional implementation of the disclosure, an embodiment of the present invention provides a display panel, as shown in fig. 1, fig. 1 is a schematic plan view of a display panel provided in an embodiment of the present invention, where the display panel includes a substrate 20 and a plurality of sub-pixels 21 disposed on one side of the substrate 20. Wherein a plurality of sub-pixels 21 may be arranged in an array on the substrate 20.
As shown in fig. 2, fig. 2 is a schematic cross-sectional structure of the display panel shown in fig. 1 along a cutting line AA', and the sub-pixel 21 includes a light emitting layer 210 and a functional layer 211 stacked together. Of course, the sub-pixel 21 further includes an anode electrode 212, a cathode electrode 213, a pixel defining layer 214, and other functional layers. Wherein the pixel defining layer 214 has a plurality of openings for defining the positions of the light emitting layers 210.
In some embodiments, the functional layer 211 may include an electron transport layer, and other functional layers include a hole injection layer, a hole transport layer, and an electron injection layer, of course, in other embodiments, other functional layers may also include an electron blocking layer, a hole blocking layer, and the like, which are not described herein again.
As shown in fig. 2, the anode 212 is disposed on the side of the light-emitting layer 210 close to the substrate 20, the cathode 213 is disposed on the side of the light-emitting layer 210 away from the substrate 20, the hole injection layer 215 and the hole transport layer 216 are sequentially stacked and disposed between the anode 212 and the light-emitting layer 210, and the electron injection layer 217 is disposed between the cathode 213 and the functional layer 211.
Certainly, the present invention is not limited to this, and in other embodiments, as shown in fig. 3, fig. 3 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, the functional layer 211 may further include a hole transport layer, and the functional layer 211, that is, the hole transport layer, is located on a side of the light emitting layer 210 away from the substrate 20. Wherein the material of the sub-layer comprises an electron transport material or a hole transport material. That is, when the functional layer 211 includes an electron transport layer, the material of the sub-layer includes an electron transport material; when the functional layer 211 comprises a hole transport layer, the material of the sub-layer comprises a hole transport material.
In addition, each sub-pixel 21 includes a pixel circuit, each of which includes a driving transistor T, as shown in fig. 2 and 3, a drain of which is electrically connected to the anode electrode 212 to transmit a driving signal to the anode electrode 212 to drive the light emitting layer 210 to emit light for image display.
In this embodiment of the present invention, the functional layer 211 includes at least one sub-layer, and the plurality of sub-pixels 21 includes sub-pixels of at least two colors, where the number of sub-layers of the functional layer 211 of the sub-pixel 21 of at least one color is different from the number of sub-layers of the functional layers 211 of the sub-pixels 21 of other colors, so that the carrier interface accumulation position of the functional layer 211 of the sub-pixel 21 of at least one color is different from the carrier interface accumulation position of the functional layers 211 of the sub-pixels 21 of other colors. It should be noted that the difference in the carrier interface accumulation positions in the embodiments of the present application is understood that, in a direction parallel to the extending direction of the functional layers, the carrier interface accumulation position of the functional layer 211 of the sub-pixel 21 of at least one color is not on the same horizontal plane as the carrier interface accumulation positions of the functional layers 211 of the sub-pixels 21 of other colors.
As can be seen from the capacitance formula C = ∈ S/4 π kd, the closer the carrier interface accumulation position of the functional layer 211 is to the anode 212, the smaller the capacitance C between the anode 212 and the cathode 213 of the subpixel 21 is, the larger the lighting speed of the subpixel 21 is, the farther the carrier interface accumulation position of the functional layer 211 is from the anode 212, the larger the capacitance C between the anode 212 and the cathode 213 of the subpixel 21 is, and the smaller the lighting speed of the subpixel 21 is. Therefore, the lighting speeds of the sub-pixels 21 of different colors can be made uniform by decreasing the capacitance of the sub-pixel 21 of at least one color having a large lighting speed and increasing the capacitance of the sub-pixel 21 of at least one color having a small lighting speed.
In practical applications, the carriers of the functional layer 211 are mostly accumulated at the interface between the sub-layer close to the light emitting layer 210 and other sub-layers or functional layers. In some embodiments of the present invention, the thicknesses of the functional layers 211 of the sub-pixels 21 of different colors are the same, and the thicknesses of the different sub-layers are also the same, based on which, the larger the number of the sub-layers of the functional layer 211 is, the closer the interface of the sub-layer of the functional layer 211 close to the light emitting layer 210 is to the anode 212, and the smaller d is, the larger the capacitance C between the anode 212 and the cathode 213 of the sub-pixel 21 is, so that the accumulated position of the carrier interface of the functional layer 211 in the sub-pixel 21 of at least one color can be adjusted by adjusting the number of the sub-layers of the functional layer 211 in the sub-pixel 21 of at least one color, and further, the lighting speed of the sub-pixel 21 of at least one color can be adjusted, so that the lighting speeds of the sub-pixels 21 of different colors tend to be consistent, and the problem of color cast of the display panel can be alleviated.
Of course, the present invention is not limited thereto, and in other embodiments, the thicknesses of the functional layers 211 of the sub-pixels 21 with different colors may be different, and the thickness of the sub-layer of the functional layer 211 in the sub-pixel 21 with at least one color near the light emitting layer 210 may be different from the thickness of the sub-layer of the functional layer 211 in the sub-pixel 21 with other colors near the light emitting layer 210, so that the carrier interface accumulation position of the functional layer 211 in the sub-pixel 21 with at least one color may be adjusted by adjusting the thickness of the sub-layer 211 in the sub-pixel 21 with at least one color, adjusting the interface position of the sub-layer of the functional layer 211 in the sub-pixel 21 with at least one color near the light emitting layer 210.
In some embodiments, the functional layer 211 has a total thickness in the range of 5nm to 200nm. Of course, the present invention is not limited thereto, and the total thickness of the functional layer 211 is required to refer to the effect of the sub-pixel 21 to design a microcavity, which is a microcavity formed by a film layer between the anode 212 and the cathode 213 of the sub-pixel 21.
On the basis of the foregoing embodiments, in some embodiments of the present invention, the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of at least one color is different from the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of other colors, so as to adjust the position where the carrier interface of the sub-layer accumulates by adjusting the energy level of the sub-layer close to the light emitting layer 210 in the sub-pixel 21 of at least one color, and further adjust the capacitance of the sub-pixel, and adjust the lighting speed of the sub-pixel 21 of at least one color, so that the lighting speeds of the sub-pixels 21 of different colors tend to be consistent, and the problem of the color cast of the display panel is alleviated. Here, the smaller the material energy level of the sub-layer close to the light-emitting layer 210, the closer the position of the sub-layer where the carrier interface is accumulated to the light-emitting layer 210, and the larger the capacitance of the sub-pixel 21, the smaller the lighting speed of the sub-pixel 21.
Of course, in other embodiments, the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of at least one color may be the same as the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of other colors, so as to adjust the carrier interface accumulation position of the functional layer 211 in the sub-pixel 21 of at least one color only by adjusting the number and/or thickness of the sub-layers.
For example, in some embodiments of the present invention, the thickness of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of at least one color is different from the thickness of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of other colors, and the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of at least one color is the same as the energy level of the material of the sub-layer of the functional layer 211 close to the light emitting layer 210 in the sub-pixel 21 of other colors, such as the same material.
In some embodiments of the present invention, as shown in fig. 2, the at least two color sub-pixels 21 include a first color sub-pixel 21a, a second color sub-pixel 21b, and a third color sub-pixel 21c. Alternatively, the first, second and third color sub-pixels 21a, 21b and 21c may be red, blue and green sub-pixels, respectively.
The functional layer 211 of the first color sub-pixel 21a includes a first sub-layer 2111, the functional layer 211 of the second color sub-pixel 21b includes a second sub-layer 2112, and the functional layer 211 of the third color sub-pixel 21c includes a third sub-layer 2113 and a fourth sub-layer 2114 which are sequentially stacked on the substrate 20. The third color sub-pixel 21c may be a red sub-pixel, a blue sub-pixel, or a green sub-pixel.
In some embodiments, the thickness of the third sublayer 2113 is different from the thicknesses of the first sublayer 2111 and the second sublayer 2112, based on which the carrier interface accumulation position S1 of the functional layer 211 in the third color subpixel 21c can be made different from the carrier interface accumulation position S2 of the functional layer 211 in the first color subpixel 21a and the carrier interface accumulation position S3 of the functional layer 211 in the second color subpixel 21b, and further the capacitance between the anode 212 and the cathode 213 in the third color subpixel 21c can be made different from the capacitance between the anode 212 and the cathode 213 in the first color subpixel 21a and the capacitance between the anode 212 and the cathode 213 in the second color subpixel 21b, and further the luminance speeds of the first color subpixel 21a, the second color subpixel 21b and the third color subpixel 21c can be made to be consistent by adjusting the capacitance of the third color subpixel 21c, and thereby alleviating the problem of color shift of the display panel.
In some embodiments, the material energy level of the third sub-layer 2113 is different from the material energy levels of the first and second sub-layers 2111 and 2112, so that the carrier interface accumulation position of the light emitting layer 210 in the third color sub-pixel 21c is different from the carrier interface accumulation position of the light emitting layer 210 in the first color sub-pixel 21a and the carrier interface accumulation position of the light emitting layer 210 in the second color sub-pixel 21b, and the lighting speeds of the first color sub-pixel 21a, the second color sub-pixel 21b and the third color sub-pixel 21c can be made to be consistent by adjusting the capacitance of the third color sub-pixel 21c, thereby alleviating the problem of streaking of the display panel.
Of course, in other embodiments, the material energy level of the third sublayer 2113 may be different from the material energy levels of the first sublayer 2111 and the second sublayer 2112 under the condition that the thickness of the third sublayer 2113 is different from the thicknesses of the first sublayer 2111 and the second sublayer 2112, and details are not repeated here.
In some embodiments of the present invention, as shown in fig. 2 and fig. 4, fig. 4 is a schematic structural diagram of the light emitting layer 210 and the functional layer 211 according to an embodiment of the present invention, and the first sub-layer 2111, the second sub-layer 2112, and the fourth sub-layer 2114 may be a common layer, that is, the first sub-layer 2111, the second sub-layer 2112, and the fourth sub-layer 2114 are communicated with each other. Based on this, the first sublayer 2111, the second sublayer 2112 and the fourth sublayer 2114 can be manufactured by using the same mask and the same process, so that the processes are reduced, and the cost is reduced.
Of course, the present invention is not limited thereto, and in other embodiments, as shown in fig. 5 and fig. 6, fig. 5 is a schematic cross-sectional structure of a display panel according to another embodiment of the present invention, fig. 6 is a schematic structural diagram of a light emitting layer 210 and a functional layer 211 according to another embodiment of the present invention, and the first sub-layer 2111, the second sub-layer 2112 and the fourth sub-layer 2114 may not be connected to each other, that is, the first sub-layer 2111, the second sub-layer 2112 and the fourth sub-layer 2114 may also be formed by different processes, so as to reduce the problem of crosstalk between adjacent sub-pixels 21.
In some embodiments of the present invention, as shown in fig. 2 and 5, the third sublayer 2113 is on a side of the common layer that is closer to the luminescent layer 210, or the fourth sublayer 2114 is on a side of the third sublayer 2113 that is further from the luminescent layer 210. However, the invention is not limited thereto, and in other embodiments, the fourth sub-layer 2114 may also be located on a side of the third sub-layer 2113 close to the light-emitting layer 210, which is not described in detail herein. The common layer may be formed by an Open Mask (Open Mask) evaporation material, and the fourth sub-layer 2114 may be formed by a fine metal Mask (FMM Mask) evaporation material.
In other embodiments of the present invention, as shown in fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, in which the functional layer 211 of the first color sub-pixel 21a includes a first sub-layer 2111, the functional layer 211 of the second color sub-pixel 21b includes a second sub-layer 2112 and a third sub-layer 2113 sequentially stacked on the substrate 20, and the functional layer 211 of the third color sub-pixel 21c includes a fourth sub-layer 2114 and a fifth sub-layer 2115 sequentially stacked on the substrate 20.
The second color sub-pixel 21b and the third color sub-pixel 21c may be a red sub-pixel and a green sub-pixel, a red sub-pixel and a blue sub-pixel, or a green sub-pixel and a blue sub-pixel, respectively.
In some embodiments, the thickness of the first sublayer 2111 is different from the thicknesses of the fourth sublayer 2114 and the second sublayer 2112, based on which the carrier interface accumulation position S2 of the functional layer 211 in the first color sub-pixel 21a can be made different from the carrier interface accumulation position S1 of the functional layer 211 in the third color sub-pixel 21c and the carrier interface accumulation position S3 of the functional layer 211 in the second color sub-pixel 21b, and further the capacitance between the anode 212 and the cathode 213 in the first color sub-pixel 21a can be made different from the capacitance between the anode 212 and the cathode 213 in the third color sub-pixel 21c and the capacitance between the anode 212 and the cathode 213 in the second color sub-pixel 21b, and further the luminance speeds of the first color sub-pixel 21a, the second color sub-pixel 21b and the third color sub-pixel 21c can be made to be consistent by adjusting the capacitance of the first color sub-pixel 21a, and thereby alleviating the problem of color shift of the display panel.
In some embodiments, the material energy level of the first sub-layer 2111 is different from the material energy levels of the fourth sub-layer 2114 and the second sub-layer 2112, so that the carrier interface accumulation position of the light emitting layer 210 in the first color sub-pixel 21a is different from the carrier interface accumulation position of the light emitting layer 210 in the third color sub-pixel 21c and the carrier interface accumulation position of the light emitting layer 210 in the second color sub-pixel 21b, and further, the lighting speeds of the first color sub-pixel 21a, the second color sub-pixel 21b and the third color sub-pixel 21c can be made to be consistent by adjusting the capacitance of the first color sub-pixel 21a, and the problem of color cast of the display panel can be alleviated.
Of course, in other embodiments, the material energy level of the third sub-layer 2113 may be different from the material energy levels of the first and second sub-layers 2111 and 2112 under the condition that the thickness of the third sub-layer 2113 is different from the thicknesses of the first and second sub-layers 2111 and 2112, which is not described herein again.
In some embodiments, as shown in fig. 7 and 8, fig. 8 is a schematic structural diagram of the light emitting layer 210 and the functional layer 211 according to another embodiment of the present invention, where the first sub-layer 2111, the third sub-layer 2113, and the fifth sub-layer 2115 are first common layers, and the second sub-layer 2112 and the fourth sub-layer 2114 are second common layers. Of course, in other embodiments, the first sub-layer 2111, the third sub-layer 2113, and the fifth sub-layer 2115 may not be connected to each other, and the second sub-layer 2112 and the fourth sub-layer 2114 may not be connected to each other, which is not described herein again.
The second common layer may be located on a side of the first common layer close to the light emitting layer 210, or on a side of the first common layer away from the light emitting layer 210, which is not described herein again. In addition, the first common layer may be formed using an Open Mask (Open Mask) evaporation material, and the second common layer may be formed using a fine metal Mask (FMM Mask) evaporation material.
In other embodiments of the present invention, as shown in fig. 9, fig. 9 is a schematic cross-sectional structure diagram of a display panel according to another embodiment of the present invention, in which the functional layer 211 of the first color sub-pixel 21a includes a first sub-layer 2111, the functional layer 211 of the second color sub-pixel 21b includes a second sub-layer 2112 and a third sub-layer 2113 sequentially stacked on the substrate 20, and the functional layer 211 of the third color sub-pixel 21c includes a fourth sub-layer 2114, a fifth sub-layer 2115 and a sixth sub-layer 2116 sequentially stacked on the substrate 20.
In some embodiments, the thickness of the fourth sublayer 2114 is different from the thicknesses of the first sublayer 2111 and the second sublayer 2112, based on which the carrier interface accumulation position S2 of the functional layer 211 in the third color subpixel 21c can be made different from the carrier interface accumulation position S1 of the functional layer 211 in the first color subpixel 21a and the carrier interface accumulation position S3 of the functional layer 211 in the second color subpixel 21b, and further the capacitance between the anode 212 and the cathode 213 in the third color subpixel 21c can be made different from the capacitance between the anode 212 and the cathode 213 in the first color subpixel 21a and the capacitance between the anode 212 and the cathode 213 in the second color subpixel 21b, and further the luminance speeds of the first color subpixel 21a, the second color subpixel 21b and the third color subpixel 21c can be made to be consistent by adjusting the capacitance of the third color subpixel 21c, and thereby alleviating the problem of color shift of the display panel.
In some embodiments, the material energy level of the fourth sub-layer 2114 is different from the material energy levels of the first and second sub-layers 2111 and 2112, so that the carrier interface accumulation position of the light emitting layer 210 in the third color sub-pixel 21c is different from the carrier interface accumulation position of the light emitting layer 210 in the first color sub-pixel 21a and the carrier interface accumulation position of the light emitting layer 210 in the second color sub-pixel 21b, and further, the lighting speeds of the first, second, and third color sub-pixels 21a, 21b, and 21c can be made to be consistent by adjusting the capacitance of the third color sub-pixel 21c, thereby alleviating the problem of streaking of the display panel.
Of course, in other embodiments, the material energy level of the fourth sublayer 2114 may be different from the material energy levels of the first sublayer 2111 and the second sublayer 2112 under the condition that the thickness of the fourth sublayer 2114 is different from the thicknesses of the first sublayer 2111 and the second sublayer 2112, and details are not repeated here.
In some embodiments, as shown in fig. 9 and 10, fig. 10 is a schematic structural diagram of the light emitting layer 210 and the functional layer 211 according to another embodiment of the present invention, where the first sub-layer 2111, the third sub-layer 2113, and the sixth sub-layer 2116 are first common layers, and the second sub-layer 2112 and the fifth sub-layer 2115 are second common layers. Of course, in other embodiments, the first sub-layer 2111, the third sub-layer 2113, and the sixth sub-layer 2116 may not be connected to each other, and the second sub-layer 2112 and the fifth sub-layer 2115 may not be connected to each other, which is not described herein again.
The second common layer may be located on a side of the first common layer close to the light emitting layer 210, the second common layer may also be located on a side of the first common layer away from the light emitting layer 210, the fourth sublayer 2114 may be located on a side of the second common layer close to the light emitting layer 210, and the fourth sublayer 2114 may also be located on a side of the second common layer away from the light emitting layer 210. In addition, the first common layer may be formed using an Open Mask (Open Mask) evaporation material, and the second common layer and the fourth sub-layer 2114 may be formed using a fine metal Mask (FMM Mask) evaporation material.
As an alternative implementation of the disclosure, an embodiment of the present invention provides a display device, which includes the display panel provided in any one of the above embodiments. As shown in fig. 11, fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device may be a smart phone, a tablet computer, a digital camera, or the like, and details thereof are not repeated herein.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present specification, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present description, which falls within the scope of protection of the present description. Therefore, the protection scope of the patent in the specification shall be subject to the appended claims.
Claims (10)
1. A display panel is characterized by comprising a substrate and a plurality of sub-pixels arranged on the substrate, wherein each sub-pixel comprises a light emitting layer and a functional layer which are arranged in a laminated mode, and each functional layer comprises at least one sub-layer;
the plurality of sub-pixels comprise sub-pixels of at least two colors, wherein the number and/or the thickness of the sub-layers of the functional layer of the sub-pixel of at least one color are different from those of the sub-pixels of other colors, so that the accumulated position of the carrier interface of the functional layer in the sub-pixel of at least one color is different from that of the functional layer in the sub-pixel of at least one other color.
2. The display panel according to claim 1, wherein a thickness of the sub-layer of the functional layer adjacent to the light emitting layer in the sub-pixel of at least one color is different from a thickness of the sub-layer of the functional layer adjacent to the light emitting layer in the sub-pixel of at least one other color.
3. The display panel according to claim 1 or 2, wherein a material energy level of a sub-layer of at least one color sub-pixel, in which the functional layer is adjacent to the light emitting layer, is different from a material energy level of a sub-layer of at least one other color sub-pixel, in which the functional layer is adjacent to the light emitting layer.
4. The display panel of claim 1, wherein the at least two color sub-pixels comprise a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel;
the functional layer of the first color sub-pixel comprises a first sub-layer; the functional layer of the second color sub-pixel comprises a second sub-layer; the functional layer of the third color sub-pixel comprises a third sub-layer and a fourth sub-layer which are sequentially stacked on the substrate;
a thickness of the third sub-layer is different from a thickness of the first sub-layer and the second sub-layer; and/or the material energy level of the third sub-layer is different from the material energy levels of the first sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
5. The display panel according to claim 4, wherein the first sub-layer, the second sub-layer, and the fourth sub-layer are a common layer, and the third sub-layer is located on a side of the common layer close to the light emitting layer.
6. The display panel according to claim 1, wherein the at least two color sub-pixels include a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the functional layer of the first color sub-pixel includes a first sub-layer, the functional layer of the second color sub-pixel includes a second sub-layer and a third sub-layer sequentially stacked on the substrate, and the functional layer of the third color sub-pixel includes a fourth sub-layer and a fifth sub-layer sequentially stacked on the substrate;
a thickness of the first sub-layer is different from a thickness of the fourth sub-layer and the second sub-layer; and/or the material energy level of the first sub-layer is different from the material energy levels of the fourth sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
7. The display panel according to claim 6, wherein the first sub-layer, the third sub-layer and the fifth sub-layer are a first common layer, and the second sub-layer and the fourth sub-layer are a second common layer, the second common layer being located on a side of the first common layer close to the light emitting layer.
8. The display panel according to claim 1, wherein the at least two color sub-pixels include a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the functional layer of the first color sub-pixel includes a first sub-layer, the functional layer of the second color sub-pixel includes a second sub-layer and a third sub-layer sequentially stacked on the substrate, and the functional layer of the third color sub-pixel includes a fourth sub-layer, a fifth sub-layer, and a sixth sub-layer sequentially stacked on the substrate;
a thickness of the fourth sublayer is different from a thickness of the first sublayer and the second sublayer; and/or the material energy level of the fourth sub-layer is different from the material energy levels of the first sub-layer and the second sub-layer;
preferably, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are a red sub-pixel, a blue sub-pixel and a green sub-pixel, respectively.
9. The display panel according to claim 8, wherein the first sub-layer, the third sub-layer and the sixth sub-layer are a first common layer, the second sub-layer and the fifth sub-layer are a second common layer, the second common layer is located on a side of the first common layer close to the light emitting layer, and the fourth sub-layer is located on a side of the second common layer close to the light emitting layer.
10. A display device comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211615477.1A CN115835700A (en) | 2022-12-15 | 2022-12-15 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211615477.1A CN115835700A (en) | 2022-12-15 | 2022-12-15 | Display panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115835700A true CN115835700A (en) | 2023-03-21 |
Family
ID=85545819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211615477.1A Pending CN115835700A (en) | 2022-12-15 | 2022-12-15 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115835700A (en) |
-
2022
- 2022-12-15 CN CN202211615477.1A patent/CN115835700A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10541277B2 (en) | Organic light emitting display device | |
| CN104885251B (en) | Transparent organic light emitting display device and method for manufacturing the same | |
| US20210336189A1 (en) | Oled substrate and oled display apparatus | |
| US7696681B2 (en) | Stacked organic electroluminescent units for white light emission provided with RGB color conversion portions | |
| US20230263010A1 (en) | Display panel and method of manufacturing same | |
| US20050040756A1 (en) | OLED device having microcavity gamut subpixels and a within gamut subpixel | |
| US11903281B2 (en) | Array substrate and manufacturing method thereof, display panel, display device and pixel driving circuit | |
| CN108962964B (en) | Display panel, preparation method thereof and display device | |
| US11594579B2 (en) | Display substrates, display devices and methods of forming display substrates and devices | |
| US11189816B2 (en) | Display substrate having a unitary cathode layer connected to a plurality of light emitting blocks, display apparatus, and method of fabricating display having the same | |
| JP6111487B2 (en) | EL display device | |
| US20240090268A1 (en) | Display panel and method for fabricating the same | |
| CN112864207B (en) | Display panel and display device | |
| US20220013745A1 (en) | Encapsulating cover plate, fabrication method thereof, display panel and fabrication method thereof | |
| CN113937144A (en) | Display panel, manufacturing method thereof and display device | |
| US8792068B2 (en) | Lighting device and electronic device | |
| US20230422551A1 (en) | Display device | |
| CN109119438B (en) | Display substrate, manufacturing method thereof and display device | |
| US10930727B2 (en) | Organic light-emitting diode display screen and electronic device | |
| US10777618B2 (en) | Transparent display panel, fabricating method for the same, and display device | |
| CN110112173B (en) | Pixel structure, preparation method thereof and display device | |
| CN115835700A (en) | Display panel and display device | |
| US20220157905A1 (en) | Display device | |
| WO2014174804A1 (en) | Method for producing el display device | |
| KR20190038320A (en) | Organic light emitting diode display device |
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 |