CN216648313U - Display panel and display device - Google Patents
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- CN216648313U CN216648313U CN202122855194.1U CN202122855194U CN216648313U CN 216648313 U CN216648313 U CN 216648313U CN 202122855194 U CN202122855194 U CN 202122855194U CN 216648313 U CN216648313 U CN 216648313U
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Abstract
The application discloses display panel and display device belongs to and shows technical field. The display panel includes: the display device comprises a substrate and a first light-emitting device positioned in a light-transmitting display area on the substrate. Wherein the first light emitting device includes: the reflective electrode and the first transparent electrode, because the orthographic projection of the reflective electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode can have higher light transmittance, ambient light can penetrate through the part of the first transparent electrode which is not in contact with the reflective electrode, and therefore the area of the anode in the first light-emitting device can be increased under the condition that the light transmittance of the light-transmitting display area is not reduced. Therefore, the brightness of the light-transmitting display area is basically consistent with the brightness of the normal display area located on the periphery of the light-transmitting display area, the service life of the first light-emitting device is effectively prolonged, and the reliability of the display panel is further improved.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a display panel and a display device.
Background
Currently, a display device usually has a photosensitive sensor such as an image sensor to implement a photographing function or a biometric function. In order to increase the screen ratio of the display device, one way is to place an image sensor in the display device below a display panel, and to make an area of the display panel directly opposite to a photosensitive sensor still display a picture under the premise of having a light-transmitting function.
A display panel may include: the display device comprises a light-transmitting display area and a normal display area arranged around the light-transmitting display area, wherein the light-transmitting display area is provided with a plurality of light-emitting devices, a pixel driving circuit corresponding to the light-emitting devices in the light-transmitting display area is positioned in the normal display area, and the light-emitting devices in the light-transmitting display area are driven by the pixel driving circuit in the normal display area. Therefore, the pixel driving circuit can be prevented from blocking ambient light, and the light-transmitting display area can have a light-transmitting function. Since the anode of the light emitting device in the light-transmitting display region usually includes a metal layer, the metal layer may reduce the light transmittance of the light-transmitting display region, and affect the use effect of the photosensor. Therefore, the light transmittance of the light-transmitting display region is increased in the related art by reducing the size of the anode in the light-emitting device of the light-transmitting display region.
After the size of the anode of the light emitting device in the display panel is reduced, the brightness of the light emitting device needs to be compensated by increasing the current, so as to ensure that the brightness of the light-transmitting display area of the display panel is consistent with the brightness of the normal display area. However, compensating the luminance of the light emitting device by increasing the current leads to a reduction in the lifetime of the light emitting device and thus to a lower reliability of the display panel.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a display panel and a display device. The technical scheme is as follows:
according to a first aspect of the present application, there is provided a display panel including:
a substrate having a light transmissive display region;
a first light emitting device located within the light transmissive display region, the first light emitting device comprising: a reflective electrode and a first transparent electrode which are stacked in a direction perpendicular to and away from the substrate;
the orthographic projection of the reflecting electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode covers one surface, far away from the substrate, of the reflecting electrode and covers the side face of the reflecting electrode.
Optionally, the first transparent electrode includes a first portion and a second portion, the first portion covers a surface of the reflective electrode away from the substrate and the side surface, and the second portion is located at a periphery of the first portion.
Optionally, the display panel further includes: a pixel defining layer on the substrate, the pixel defining layer defining a plurality of first sub-pixel regions in the light transmissive display region, the first light emitting devices being located in the first sub-pixel regions;
an orthographic projection of the pixel defining layer on the substrate and an orthographic projection of the second portion on the substrate overlap, and the orthographic projection of the pixel defining layer on the substrate and an orthographic projection of the first portion on the substrate do not overlap.
Optionally, the substrate further has a normal display region located at the periphery of the light-transmitting display region;
the display panel further includes: and the orthographic projection of the anode of the second light-emitting device on the substrate is the same as that of the first transparent electrode on the substrate in shape and area.
Optionally, an orthographic projection of the reflective electrode on the substrate is circular, and an orthographic projection of the first transparent electrode on the substrate is rhombic or hexagonal.
Optionally, the first light emitting device further includes: and the orthographic projection of the reflecting electrode on the substrate is positioned in the orthographic projection of the second transparent electrode on the substrate.
Optionally, the first transparent electrode further covers a side surface of the second transparent electrode, or a boundary of an orthographic projection of the first transparent electrode on the substrate coincides with a boundary of an orthographic projection of the second transparent electrode on the substrate.
Optionally, the substrate includes: the display device comprises a substrate and a first pixel driving circuit which is positioned on the substrate and electrically connected with the second transparent electrode.
Optionally, the display panel further includes: and the light-emitting material layer and the cathode layer are positioned on one side of the first transparent electrode, which is far away from the substrate, and are stacked along the direction far away from the substrate.
According to another aspect of the present application, there is provided a display device including:
the display panel comprises a photosensitive sensor and the display panel, wherein the orthographic projection of a light receiving surface of the photosensitive sensor on the substrate is positioned in the light-transmitting display area.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
provided is a display panel including: the display device comprises a substrate and a first light-emitting device positioned in a light-transmitting display area on the substrate. Wherein the first light emitting device includes: the reflective electrode and the first transparent electrode are stacked along the direction perpendicular to and far away from the substrate, and because the orthographic projection of the reflective electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode can have high light transmittance, ambient light can penetrate through the part, which is not in contact with the reflective electrode, of the first transparent electrode, so that the area of the anode in the first light-emitting device can be increased under the condition that the light transmittance of the light-transmitting display area is not reduced. Therefore, the brightness of the first light-emitting device in the light-transmitting display area is not required to be compensated in a current increasing mode, the brightness of the light-transmitting display area is basically consistent with the brightness of a normal display area located on the periphery of the light-transmitting display area, the service life of the first light-emitting device is effectively prolonged, and the reliability of the display panel is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel;
FIG. 2 is a partially enlarged schematic view of the display panel shown in FIG. 1;
fig. 3 is a top view of a display panel provided in an embodiment of the present application;
FIG. 4 is a schematic view of a partial pixel arrangement of the display panel shown in FIG. 3;
FIG. 5 is a schematic cross-sectional view of the display panel shown in FIG. 4 along line A1-A2;
fig. 6 is a schematic structural view of the first light emitting device shown in fig. 5;
fig. 7 is a schematic structural diagram of another first light-emitting device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
At present, in order to increase the screen ratio of the display device, the display panel in the display device may be designed as a partially light-transmissive display panel. For example, the display panel has: a normal display area and a light-transmitting display area. The non-light-transmitting normal display area and the light-transmitting display area are both provided with light-emitting devices, so that the non-light-transmitting normal display area and the light-transmitting display area can display pictures.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional display panel. The display panel 10 includes: a light-transmissive display region 11 and a non-light-transmissive normal display region 12. The photosensor in the display device is located on the side opposite to the display surface of the display panel 10, and the orthographic projection of the photosensitive surface of the photosensor on the display panel 10 is located in the light-transmitting display region 11.
As shown in fig. 2, fig. 2 is a partially enlarged schematic view of the display panel shown in fig. 1. A first light emitting device 111 is disposed in the light transmissive display region 11, and a second light emitting device 121 is disposed in the normal display region 12. The area of the orthographic projection of the first light emitting device 111 in the light-transmitting display region 11 on the substrate of the display panel 10 is generally smaller than the area of the orthographic projection of the second light emitting device 121 in the normal display region 12 on the substrate of the display panel 10, so that ambient light can enter the light receiving surface of the photosensor through the light-transmitting display region 11. Therefore, the photosensitive sensor can work normally under the condition that the screen occupation ratio of the display device is high.
In the display panel 10, in order to ensure that the luminance of the transparent display area 11 of the display panel 10 is consistent with the luminance of the normal display area 12, the luminance of the first light emitting device 111 in the transparent display area 11 needs to be compensated by increasing the current, but the way of compensating the luminance of the first light emitting device 111 by increasing the current may result in a shortened service life of the first light emitting device 111, and further, the reliability of the display panel 10 is low.
The embodiment of the application provides a display panel and a display device, which can solve the problems existing in the related art.
Fig. 3 is a top view of a display panel according to an embodiment of the present disclosure, fig. 4 is a schematic diagram of a partial pixel arrangement of the display panel shown in fig. 3, fig. 5 is a schematic diagram of a cross-sectional structure of the display panel shown in fig. 4 along a line a1-a2, and fig. 6 is a schematic diagram of a structure of the first light emitting device shown in fig. 5. Please refer to fig. 3, fig. 4, fig. 5 and fig. 6. The display panel 20 may include: a substrate 21 and a first light emitting device 22. The substrate 21 may have a light-transmissive display region 211. The first light emitting device 22 may be positioned in the light-transmissive display region 211.
The first light emitting device 22 may include: the reflective electrode 221 and the first transparent electrode 222 are stacked in a direction f1 perpendicular to and away from the substrate 21. It should be noted that the reflective electrode 221 and the first transparent electrode 222 are in contact with each other, and therefore, the reflective electrode 221 and the first transparent electrode 222 can constitute an anode in the first light emitting device 22.
The reflective electrode 221 may have a side surface S1, and a surface (top surface) S2 connected to the side surface S1 away from the substrate 21. The first transparent electrode 222 covers the surface S2 of the reflective electrode 221 away from the substrate 21 and covers the side surface S1 of the reflective electrode 221.
Wherein, the orthographic projection of the reflective electrode 221 on the substrate 21 can be located within the orthographic projection of the first transparent electrode 222 on the substrate 21. That is, there is an overlap of the orthographic projection of the first transparent electrode 222 on the base plate 21 with the orthographic projection of the side face S1 of the reflective electrode 221 and the face (top face) S2 away from the base plate 21 on the base plate 11, and the area of the orthographic projection of the first transparent electrode 222 on the base plate 21 may be larger than the area of the orthographic projection of the reflective electrode 221 on the base plate 21.
Since the first transparent electrode 222 may have a high light transmittance, ambient light may transmit through a portion of the first transparent electrode 222 that is not in contact with the reflective electrode 221, and thus, the area of the anode in the first light emitting device 22 may be increased without reducing the light transmittance of the light-transmitting display region 211. Therefore, the brightness of the first light-emitting device 22 in the light-transmitting display area 211 does not need to be compensated by increasing the current, the brightness of the light-transmitting display area 211 is basically consistent with the brightness of a normal display area located at the periphery of the light-transmitting display area 211, the service life of the first light-emitting device 22 is effectively prolonged, and the reliability of the display panel 20 is further improved.
In addition, the light transmittance of the first transparent electrode 222 may be greater than that of the reflective electrode 221. For example, the first transparent electrode 222 may be made of a light-transmissive conductive material, and the light-transmissive conductive material may include: indium Tin Oxide (ITO), the reflective electrode 221 may be made of a metal material, and the metal material may include silver (Ag).
Thus, the first transparent electrode 222 made of a non-metal material can cover the top surface S2 and the side surface S1 of the reflective electrode 221 made of a metal material, and the first transparent electrode 222 can be used to protect the reflective electrode 221 from being oxidized due to water and oxygen. The stability of the first light emitting device 22 can be further improved, and thus the reliability of the display panel 20 can be further improved.
In summary, the present application provides a display panel, including: the display device comprises a substrate and a first light-emitting device positioned in a light-transmitting display area on the substrate. Wherein the first light emitting device includes: the reflective electrode and the first transparent electrode are stacked along the direction perpendicular to and far away from the substrate, and because the orthographic projection of the reflective electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode can have high light transmittance, ambient light can penetrate through the part, which is not in contact with the reflective electrode, of the first transparent electrode, so that the area of the anode in the first light-emitting device can be increased under the condition that the light transmittance of the light-transmitting display area is not reduced. Therefore, the brightness of the first light-emitting device in the light-transmitting display area is not required to be compensated in a current increasing mode, the brightness of the light-transmitting display area is basically consistent with the brightness of a normal display area located on the periphery of the light-transmitting display area, the service life of the first light-emitting device is effectively prolonged, and the reliability of the display panel is further improved.
Alternatively, as shown in fig. 5, the first transparent electrode 222 may include a first portion 2221 and a second portion 2222, the first portion 2221 may cover a side surface and a side surface of the reflective electrode 221 away from the substrate 21, and the second portion 2222 may be located at the periphery of the first portion 2221. That is, the first transparent electrode 222 may include a first portion 2221 positioned on the side surface S1 and the top surface S2 of the reflective electrode 221, and a second portion 2222 positioned on the substrate 21, the first portion 2221 and the second portion 2222 being connected. The area of the orthographic projection of the first transparent electrode 222 on the substrate 21 may be further made larger than the area of the orthographic projection of the reflective electrode 221 on the substrate 21.
In this way, the reflective electrode 221 may make the light emitting efficiency of the first light emitting device 22 located in the light transmissive display region 211 higher, so that the luminance of the first light emitting device 22 may be made higher; the light transmittance of the first transparent electrode 222 is high, so that the light transmittance of the light-transmitting display region 211 is high, and meanwhile, the second portion 2222 of the first transparent electrode 222 can further increase the area of the anode of the first light-emitting device 22, so that the brightness of the first light-emitting device 22 can be further improved. Further, the brightness of the light-transmitting display region 211 of the display panel 20 can be made the same as the brightness of the normal display region 212. The compensation of the brightness of the first light emitting device 22 by increasing the current can be avoided, and the service life of the first light emitting device 22 can be further improved.
As shown in fig. 5 and 6, the display panel 20 may further include: a pixel defining layer 23 on the substrate 21, the pixel defining layer 23 may be used to define a plurality of first sub-pixel regions in the light-transmissive display region, and the first light emitting devices may be located in the first sub-pixel regions.
There is an overlap between the orthographic projection of the pixel defining layer 23 on the substrate 21 and the orthographic projection of the second portion 2222 of the first transparent electrode 222 on the substrate 21, and there is no overlap between the orthographic projection of the pixel defining layer 23 on the substrate 21 and the orthographic projection of the first portion 2221 of the first transparent electrode 222 on the substrate 21.
In the first sub-pixel region in the embodiment of the present application, the orthographic projection of the anode in the first light emitting device on the substrate 21 may include the orthographic projection of the second portion 2222 and the first portion 2221 of the first transparent electrode 222, and since the area of the orthographic projection of the first transparent electrode 222 on the substrate 21 is larger than the area of the orthographic projection of the reflective electrode 221 on the substrate 21, compared with the related art in which the orthographic projection of the anode in the first light emitting device in the light-transmissive display region on the substrate only includes the orthographic projection of the reflective electrode, the light emitting size of the first light emitting device in the embodiment of the present application is larger. So that the brightness of the first light emitting device can be increased.
As shown in fig. 4 and 5, the substrate 21 may further have a normal display region 212 located at the periphery of the light-transmissive display region 211. The display panel 20 may further include: and a second light emitting device 24 positioned within the normal display area 212. The pixel defining layer 23 may serve to define a plurality of second sub-pixel regions within the normal display region 212, and the second light emitting devices 24 may be located in the second sub-pixel regions.
The orthographic projection of the anode of the second light emitting device 24 on the substrate 21 is the same shape and area as the orthographic projection of the first transparent electrode 222 on the substrate 21. The second sub-pixel region has the same shape and the same area as the orthographic projection of the first sub-pixel region on the substrate 21.
Optionally, the display panel 20 may further include: and a light emitting material layer 224 and a cathode layer 225 which are positioned on a side of the first transparent electrode 222 facing away from the substrate 21 and are stacked in a direction f1 away from the substrate 21. In the embodiment of the present application, the first Light Emitting device 22 and the second Light Emitting device 24 may be Organic Light-Emitting Diode (OLED). The cathode layer 225 may have a whole layer structure.
The first and second light emitting devices 22 and 24 in the display panel 20 may have a microcavity structure, that is, each of the first and second light emitting devices 22 and 24 may include: an anode, a light emitting material layer, and a cathode layer are sequentially disposed on the substrate. Of the two electrodes of the first light emitting device 22 and the second light emitting device 24, the anode electrode close to the substrate base plate 21 includes a reflective electrode, and the cathode electrode far from the substrate base plate 21 includes a semi-transparent counter electrode, which can form a resonant cavity. The distance between the reflective electrode and the semi-transparent semi-reflective electrode is the cavity length of the resonant cavity, and the wavelength of the light emitted by the first light-emitting device 22 and the second light-emitting device 24 is positively correlated with the cavity length of the resonant cavity. The resonant cavity can be used for filtering light of a certain color from the white light to amplify the energy of the light, and attenuating the energy of other light with the color different from the certain color, so that the first light emitting device 22 and the second light emitting device 24 can emit the light of the certain color, and the brightness of the light emitted by the first light emitting device 22 and the second light emitting device 24 can be high.
In the related art, because the shapes and sizes of the first light emitting device in the light-transmitting display area and the second light emitting device in the normal display area are different, the microcavity structures of the first light emitting device in the light-transmitting display area and the second light emitting device in the normal display area are different, and thus the viewing angles and the colors of the light-transmitting display area and the normal display area are inconsistent. In the embodiment of the present application, the orthographic projection of the anode of the second light emitting device 24 on the substrate 21 is the same as the orthographic projection of the first transparent electrode 222 of the first light emitting device 22 on the substrate 21 (that is, the orthographic projection of the anode on the substrate 21), and the area is the same, so that the shapes, the sizes and the microcavity structures of the light emitting devices in the light-transmitting display area 211 and the normal display area 212 are the same, and thus the viewing angles and the colors of the light-transmitting display area and the normal display area are consistent, and the uniformity of the display panel can be improved.
Further, optionally, as shown in fig. 4, the orthographic projection of the reflective electrode 221 on the substrate 21 is circular, so that widths of gaps at different positions between adjacent reflective electrodes 221 are different, when external light passes around the reflective electrode 221, diffraction fringes with different positions and different diffusion directions can be generated at different width positions, and further, a relatively obvious diffraction effect cannot be generated, and influence on use of the photosensor corresponding to the light-transmitting display area 211 can be avoided.
The shape of the orthographic projection of the first transparent electrode 222 on the substrate 21 is a diamond or a hexagon, and can be the same as the shape of the second light emitting device 24 in the normal display area 212, so that the display effects of the light-transmitting display area 211 and the normal display area 212 are relatively similar, and the uniformity of the display panel can be improved.
It should be noted that, in the embodiment of the present application, the shape of the orthographic projection of the first transparent electrode 222 on the substrate 21 may also be a triangle or a rectangle, and the embodiment of the present application is not limited herein.
Alternatively, as shown in fig. 5 and 6, the first light emitting device 22 may further include: and a second transparent electrode 223 positioned on a side of the reflective electrode 221 facing away from the first transparent electrode 222, wherein an orthographic projection of the reflective electrode 221 on the substrate 21 is positioned within an orthographic projection of the second transparent electrode 223 on the substrate 21. On one hand, the second transparent electrode 223 may increase adhesion between the reflective electrode 221 and the substrate 21 to improve stability of the reflective electrode 221, and on the other hand, the material of the second transparent electrode 223 may include indium tin oxide, which may be used to protect the reflective electrode 221 to further improve stability of the reflective electrode 221.
Fig. 7 is a schematic structural diagram of another first light emitting device according to an embodiment of the present application, please refer to fig. 6 and 7. Optionally, the first transparent electrode 222 may further cover a side surface of the second transparent electrode 223, and an orthographic projection of the second transparent electrode 223 on the substrate 21 may overlap with an orthographic projection of the first portion 2221 of the first transparent electrode 222 on the substrate 21, and may not overlap with an orthographic projection of the second portion 2222 of the first transparent electrode 222 on the substrate 21. In this way, the second transparent electrode 223 and the reflective electrode 221 may be formed through a single patterning process to reduce the manufacturing steps of the display panel 20.
Alternatively, the boundary of the orthographic projection of the first transparent electrode 222 on the substrate 21 and the boundary of the orthographic projection of the second transparent electrode 223 on the substrate 21 overlap. An orthographic projection of the second transparent electrode 223 on the substrate 21 may overlap with an orthographic projection of the first portion of the first transparent electrode 222 and the second portion 2222 on the substrate 21. As such, the difference in thickness at each position of the anode of the first light emitting device 22 can be made small to improve the performance of the first light emitting device 22.
Alternatively, as shown in fig. 6, the first light emitting device 22 in the light-transmitting display region 211 may include a red OLED device for emitting red light, a green OLED device for emitting green light, and a blue OLED device for emitting blue light. In the region where the emitting electrode 222 in the first light emitting device 22 is located, the anode may have a structure of an ITO layer, an Ag layer, and an ITO layer stacked in a direction away from the substrate 21, the microcavity structure of the region may generate a stronger microcavity effect and a higher color purity of light, and may be regarded as a main light emitting portion of the first light emitting device 22, and in the region where the second portion 222 of the first transparent electrode 222 is located, the anode may have a structure of a TIO layer, the microcavity structure of the region may generate a stronger microcavity effect and a higher color purity of light, and may be regarded as an auxiliary light emitting portion of the first light emitting device 22.
Because the light emitting devices of different colors emit light with different wavelengths and with different requirements for the microcavity of the OLED device, the ratio of the sizes of the first portion 2221 of the first transparent electrode 222 and the second transparent electrode 2222 in the first light emitting device 22 can be set to different ratios according to the color of the light emitted from the light emitting device, for example, since the blue OLED device generally has a short lifetime and the blue OLED device emits blue light with high color purity and low dependency on the microcavity structure, the blue OLED device can be smaller than the ratio of the sizes of the first portion 2221 of the first transparent electrode 222 and the second transparent electrode 2222 in the red OLED device and/or the blue OLED device.
Alternatively, as shown in fig. 5, the substrate may include: a substrate 213, and a first pixel driving circuit 214 on the substrate 213 and electrically connected to the second transparent electrode 223 of the first light emitting device 22. The first pixel driving circuit 213 may be located in the light-transmitting display region 211 or the normal display region 212.
When the first pixel driving circuit 231 is located in the normal display region 212, the anode of the first light emitting device 22 may be electrically connected to the first pixel driving circuit 231 through a connection line to drive the first light emitting device 22 to emit light. In order to further improve the light transmittance of the light-transmitting display region 211, the first light-emitting device 22 in the light-transmitting display region 211 and the first pixel driving circuit 213 in the normal display region 212 may be connected by a connection line made of a light-transmitting conductive material, which may be indium tin oxide. The normal display region 212 may also have therein a second pixel driving circuit 215 electrically connected to the second light emitting device 24.
To sum up, an embodiment of the present application provides a display panel, including: the display device comprises a substrate and a first light-emitting device positioned in a light-transmitting display area on the substrate. Wherein the first light emitting device includes: the reflective electrode and the first transparent electrode are stacked along the direction perpendicular to and far away from the substrate, and because the orthographic projection of the reflective electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode can have high light transmittance, ambient light can penetrate through the part, which is not in contact with the reflective electrode, of the first transparent electrode, so that the area of the anode in the first light-emitting device can be increased under the condition that the light transmittance of the light-transmitting display area is not reduced. Therefore, the brightness of the first light-emitting device in the light-transmitting display area is not required to be compensated in a current increasing mode, the brightness of the light-transmitting display area is basically consistent with the brightness of a normal display area located on the periphery of the light-transmitting display area, the service life of the first light-emitting device is effectively prolonged, and the reliability of the display panel is further improved.
The embodiment of the present application further provides a display device, and the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
The display device may include: the display panel in any embodiment above and the light-sensitive sensor, wherein the orthographic projection of the light-sensitive receiving surface of the light-sensitive sensor on the substrate is located in the light-transmitting display region. The photosensitive sensor may be an image sensor, a light sensor, a distance sensor, or the like in the camera. The shape of the light-transmitting display area may be circular, oval or two oval shapes juxtaposed, which is not limited in the embodiment of the present application.
Embodiments of the present application provide a method for manufacturing a display panel, which may be used to manufacture the display panel provided in the above embodiments. The method can comprise the following steps:
step 301, providing a substrate.
Alternatively, the substrate may be a flexible substrate, and the flexible substrate may be made of a flexible material (e.g., polyimide PI material). Alternatively, the substrate may be a glass substrate. And sequentially forming a buffer layer, a channel layer, a gate insulating layer, a gate electrode layer, an interlayer insulating layer, a source drain layer, a planarization layer and other functional film layers on the substrate. Referring to fig. 3, the substrate 21 may have a light-transmissive display region 211 and a normal display region 212 surrounding the light-transmissive display region 211.
Step 302, forming a second transparent electrode and a reflective electrode in the light-transmitting display region.
First, a first transparent conductive material layer and a metal material layer may be sequentially deposited in the transparent display region, wherein the thickness of the first transparent conductive material layer may be 50-500 angstroms, and the thickness of the metal material layer may be 500-1500 angstroms. And secondly, carrying out primary patterning process on the first light-transmitting conductive material layer and the metal material layer to form a second transparent electrode and a reflecting electrode.
Step 303 is to form a first transparent electrode on the substrate on which the second transparent electrode and the reflective electrode are formed.
First, a second transparent conductive material layer may be formed on the reflective electrode in the transparent display region, wherein the thickness of the second transparent conductive material layer may be in a range of 50 to 500 angstroms. Secondly, a patterning process is carried out on the second light-transmitting conductive material layer to form a first transparent electrode.
Step 304, forming a pixel defining layer, a light emitting material layer, a cathode layer and an isolation layer on the substrate on which the first transparent electrode is formed.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless explicitly defined otherwise.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A display panel, comprising:
a substrate having a light transmissive display region;
a first light emitting device located within the light transmissive display region, the first light emitting device comprising: a reflective electrode and a first transparent electrode which are stacked in a direction perpendicular to and away from the substrate;
the orthographic projection of the reflecting electrode on the substrate is positioned in the orthographic projection of the first transparent electrode on the substrate, and the first transparent electrode covers one surface, far away from the substrate, of the reflecting electrode and covers the side face of the reflecting electrode.
2. The display panel according to claim 1, wherein the first transparent electrode includes a first portion covering a surface of the reflective electrode away from the substrate and the side surface, and a second portion located at a periphery of the first portion.
3. The display panel according to claim 2, characterized in that the display panel further comprises: a pixel defining layer on the substrate, the pixel defining layer defining a plurality of first sub-pixel regions in the light transmissive display region, the first light emitting devices being located in the first sub-pixel regions;
an orthographic projection of the pixel defining layer on the substrate and an orthographic projection of the second portion on the substrate overlap, and the orthographic projection of the pixel defining layer on the substrate and an orthographic projection of the first portion on the substrate do not overlap.
4. The display panel according to claim 1, wherein the substrate further has a normal display region located at a periphery of the light-transmissive display region;
the display panel further includes: and the orthographic projection of the anode of the second light-emitting device on the substrate is the same as that of the first transparent electrode on the substrate in shape and area.
5. The display panel according to claim 4, wherein an orthogonal projection of the reflective electrode on the substrate is circular, and an orthogonal projection of the first transparent electrode on the substrate is rhombic or hexagonal.
6. The display panel according to any one of claims 1 to 5, wherein the first light-emitting device further comprises: and the orthographic projection of the reflecting electrode on the substrate is positioned in the orthographic projection of the second transparent electrode on the substrate.
7. The display panel according to claim 6, wherein the first transparent electrode further covers a side surface of the second transparent electrode, or wherein a boundary of an orthographic projection of the first transparent electrode on the substrate coincides with a boundary of an orthographic projection of the second transparent electrode on the substrate.
8. The display panel according to claim 6, wherein the substrate comprises: the display device comprises a substrate and a first pixel driving circuit which is positioned on the substrate and electrically connected with the second transparent electrode.
9. The display panel according to any one of claims 1 to 5, characterized by further comprising: and the light-emitting material layer and the cathode layer are positioned on one side of the first transparent electrode, which is far away from the substrate, and are stacked along the direction far away from the substrate.
10. A display device, comprising: a photosensor and the display panel of any one of claims 1 to 9, an orthographic projection of a light receiving surface of the photosensor on the substrate being located within the light-transmissive display region.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122855194.1U CN216648313U (en) | 2021-11-19 | 2021-11-19 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122855194.1U CN216648313U (en) | 2021-11-19 | 2021-11-19 | Display panel and display device |
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| CN216648313U true CN216648313U (en) | 2022-05-31 |
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| CN202122855194.1U Active CN216648313U (en) | 2021-11-19 | 2021-11-19 | Display panel and display device |
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| CN (1) | CN216648313U (en) |
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