CN109686761B - Display panel - Google Patents
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- CN109686761B CN109686761B CN201811538611.6A CN201811538611A CN109686761B CN 109686761 B CN109686761 B CN 109686761B CN 201811538611 A CN201811538611 A CN 201811538611A CN 109686761 B CN109686761 B CN 109686761B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
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Abstract
The invention provides a display panel, and relates to the technical field of display. The display panel includes: an organic light emitting layer; the first electrode and the second electrode are electrically connected with the organic light-emitting layer and drive the organic light-emitting layer to emit light, and the polarities of the first electrode and the second electrode are opposite; the liquid crystal layer is positioned on the light emergent side of the organic light emitting layer; the third electrode and the second electrode are electrically connected with the liquid crystal layer and drive the liquid crystal layer to switch between a shielding state of shielding light emitted by the organic light emitting layer and a transmitting state of transmitting the light emitted by the organic light emitting layer. According to the embodiment of the invention, the liquid crystal layer which is controlled to be transparent or not by the electric field is arranged in the display panel, so that the display panel can prevent the light containing UV from irradiating the organic layer or the inorganic layer in a non-display state, the exposure time of the organic layer or the inorganic layer under the light containing UV is effectively shortened, and the generation of cations or anions is avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel.
Background
At present, after a display panel is exposed for a long time under the illumination condition, the display brightness is often reduced, even the display light-emitting device cannot emit light at last, and the service life is seriously shortened. Therefore, how to avoid the display brightness reduction of the display panel under the illumination condition becomes an urgent problem to be solved.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to a display panel, so as to solve the problem of the display panel in the prior art that the display brightness is reduced under the illumination condition.
One aspect of the present invention provides a display panel including: an organic light emitting layer; the first electrode and the second electrode are electrically connected with the organic light-emitting layer and drive the organic light-emitting layer to emit light, and the polarities of the first electrode and the second electrode are opposite; the liquid crystal layer is positioned on the light emergent side of the organic light emitting layer; and the third electrode is electrically connected with the second electrode and drives the liquid crystal layer to switch between a shielding state for shielding light emitted by the organic light emitting layer and a light transmitting state for transmitting the light emitted by the organic light emitting layer.
In one embodiment of the present invention, the first electrode, the organic light emitting layer, the second electrode, the liquid crystal layer, and the third electrode are stacked.
In one embodiment of the present invention, the first electrode is a cathode, the second electrode is an anode, and the third electrode is a cathode.
In one embodiment of the present invention, the liquid crystal layer includes an inner side facing the organic light emitting layer, and the display panel further includes a light extraction layer positioned at an outer side of the liquid crystal layer and a thin film encapsulation layer positioned between the liquid crystal layer and the light extraction layer.
In one embodiment of the present invention, the display panel further includes a thin film transistor backplane, wherein the thin film transistor backplane is provided with a liquid crystal driving circuit that controls a power-on state of the second electrode and the third electrode.
In an embodiment of the present invention, the tft backplane is further provided with a display driving circuit for controlling the power-on states of the first electrode and the second electrode, wherein the liquid crystal driving circuit and the display driving circuit are powered by the same driving power source.
In one embodiment of the present invention, the display panel further comprises a controller electrically connected to the liquid crystal driving circuit and the display driving circuit, wherein the controller is configured to: receiving a display starting instruction; and controlling the display driving circuit and the liquid crystal driving circuit to be simultaneously conducted according to the display starting instruction.
In one embodiment of the invention, the controller is further configured to: receiving a display closing instruction; and controlling the display driving circuit and the liquid crystal driving circuit to be disconnected simultaneously according to the display closing instruction.
In one embodiment of the present invention, the liquid crystal layer includes a first alignment film, a liquid crystal polymer, and a second alignment film; wherein the liquid crystal polymer is disposed between the first alignment film and the second alignment film; when the second electrode and the third electrode are electrified, the first alignment film and the second alignment film control the liquid crystal polymer to be linearly arranged.
In one embodiment of the present invention, the liquid crystal layer includes an outer side opposite to the organic light emitting layer, and the display panel further includes a cover plate disposed at the outer side of the liquid crystal layer.
According to the embodiment of the invention, the liquid crystal layer which is controlled to be transparent or not by the electric field is arranged in the display panel, so that the display panel can prevent light containing UV from irradiating an internal organic layer or inorganic layer in a non-display state, and can allow display light generated by the organic light-emitting layer to pass through and enter eyes of a user in a display state, thereby effectively shortening the exposure time of the organic layer or inorganic layer under the light containing UV and avoiding generation of cations or anions.
Drawings
Fig. 1 is a schematic configuration diagram of a display panel according to an embodiment of the present invention.
Fig. 2a is a schematic structural view of a top emission display panel according to an embodiment of the present invention.
Fig. 2b is a schematic structural diagram of a bottom emission display panel according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a display panel according to another embodiment of the present invention.
Fig. 4 is a control flow diagram of a controller according to one embodiment of the invention.
Fig. 5 is a control flow diagram of a controller according to another embodiment of the present invention.
The reference numbers in the above figures are as follows: the liquid crystal display comprises a first electrode 1, an organic light-emitting layer 2, a second electrode 3, a liquid crystal layer 4, a third electrode 5, a light extraction layer 6 and a thin film packaging layer 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
As described in the background art, the display panel in the prior art may have a reduced display brightness, thereby affecting the normal display of the display panel, and the inventors have studied and found that the problem is caused because the Organic Light-Emitting Diode (OLED) display panel includes ultraviolet Light (UV) in the Light exposed for a long time, but the Organic layer or the inorganic layer in the display panel generates cations or anions when exposed to the UV-containing Light for a long time, and when the cations or anions move into the Organic Light-Emitting layer, the cations or anions are combined with the material of the hole injection layer therein, thereby reducing the Light-Emitting efficiency of the Organic Light-Emitting layer, and the material of the cathode layer is prone to generate electron concentration, thereby causing the shrinkage of the cathode layer, thereby reducing the pixel size, and reducing the display brightness, and finally causing the display Light-Emitting device to fail to emit Light, the service life of the display panel is finished.
In order to solve the problem of the reduction of the display luminance, the inventors have studied that if the exposure time of the organic layer or the inorganic layer to the light including UV can be shortened, the generation of cations or anions can be effectively prevented, and the pixel reduction can be improved to a great extent.
Fig. 1 is a schematic configuration diagram of a display panel according to an embodiment of the present invention.
Based on this, the present invention provides a display panel, as shown in fig. 1, which may include an aspect of the present invention that provides a display panel, including: an organic light-emitting layer 2; the first electrode 1 and the second electrode 3 are electrically connected with the organic light-emitting layer 2 and drive the organic light-emitting layer 2 to emit light, and the polarities of the first electrode 1 and the second electrode 3 are opposite; a liquid crystal layer 4 positioned on the light emitting side of the organic light emitting layer 2; the third electrode 5 has the same polarity as the first electrode 1, the third electrode 5 and the second electrode 3 are electrically connected to the liquid crystal layer 4 and drive the liquid crystal layer 4 to switch between a shielding state of shielding light emitted by the organic light emitting layer 2 and a light transmitting state of transmitting light emitted by the organic light emitting layer 2, the position relationship among the first electrode, the second electrode and the third electrode and the distribution of the cathode and the anode are not limited, and all the position relationship and the distribution of the cathode and the anode which can realize the above states are all in the present case.
Specifically, the liquid crystal layer 4 is a film layer including a substance in a liquid crystal state, the liquid crystal layer 4 may be positioned between a user and the organic light emitting layer 2, and the state of the liquid crystal layer 4 may be controlled by an electric field between the second electrode 3 and the third electrode 5. When the second electrode 3 and the third electrode 5 are electrified, an electric field exists between the second electrode 3 and the third electrode 5, the liquid crystal layer 4 is arranged in order under the action of the electric field, and meanwhile, display light generated by the organic light-emitting layer 2 can penetrate through the liquid crystal layer 4 and enter eyes of a user, so that the user can see displayed contents; when the second electrode 3 and the third electrode 5 are not energized, no electric field exists between the second electrode 3 and the third electrode 5, and the liquid crystal layer 4 is in an irregularly dispersed state, so that external light including UV can be blocked from irradiating on the organic layer or the inorganic layer of the display panel through the liquid crystal layer 4.
In addition, the liquid crystal layer 4 cannot pass through the display light generated by the organic light emitting layer 2 when the first electrode 1 and the second electrode 3 are energized, even in the absence of an electric field between the second electrode 3 and the third electrode 5.
For the organic light emitting layer 2, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer may be specifically included, wherein holes generated at the anode may reach the light emitting layer through the hole injection layer and the hole transport layer, and correspondingly, electrons generated at the cathode may reach the light emitting layer through the electron injection layer and the electron transport layer, where the electrons and holes are recombined to form an excited state, and then the excited state is attenuated to emit light.
In the embodiment of the invention, the liquid crystal layer 4 controlled by the electric field is arranged in the display panel, so that the display panel can prevent light containing UV from irradiating on the internal organic layer or inorganic layer in a non-display state, and can allow display light generated by the organic light-emitting layer 2 to pass through and enter eyes of a user in a display state, thereby effectively shortening the exposure time of the organic layer or inorganic layer under the light containing UV and avoiding the generation of cations or anions.
It should be understood that, herein, the light including UV may refer to light including only UV, and may also be polychromatic light including UV.
Here, the first electrode 1 may be an anode or a cathode. Accordingly, the second electrode 3 may be a cathode or an anode. Based on this, there will be two cases, namely a case where the cathode is shared (i.e. the first electrode 1 is the anode, the second electrode 3 is the cathode, and the third electrode 5 is the anode) and a case where the anode is shared (i.e. the first electrode 1 is the cathode, the second electrode 3 is the anode, and the third electrode 5 is the cathode), and the two cases are similar, and in order to avoid repetition, the case where the cathode is shared will be described as an example, and the case where the anode is shared will not be described again.
For convenience of description, hereinafter, the first electrode 1 is referred to as a first anode 1, the second electrode 3 is referred to as a cathode 3, and the third electrode 5 is referred to as a second anode 5.
Fig. 2a is a schematic structural view of a top emission display panel according to an embodiment of the present invention.
In one embodiment of the present invention, the first electrode 1, the organic light emitting layer 2, the second electrode 3, the liquid crystal layer 4, and the third electrode 5 are stacked.
Specifically, the light emitting manner of the display panel provided by the embodiment of the present invention may be top light emitting or bottom light emitting. As shown in fig. 2a, if the light emitting mode of the display panel is top-emission, the display light is emitted from the cathode 3, and accordingly, the layers in the display panel may be stacked in such a manner that the first anode 1, the organic light emitting layer 2, the cathode 3, the liquid crystal layer 4 and the second anode 5 are disposed, so that the liquid crystal layer 4 may be located on the outgoing path of the display light. Here, the organic light emitting layer 2 is configured to generate display light when the first anode 1 and the cathode 3 are energized; the liquid crystal layer 4 is configured to allow display light to pass therethrough when the cathode 3 and the second anode 5 are energized, or the liquid crystal layer 4 is configured to block the display light from passing therethrough when the cathode 3 and the second anode 5 are not energized, so that the display panel can prevent light including UV from being irradiated onto an internal organic layer or inorganic layer in a non-display state.
In one embodiment of the invention, the first electrode 1 is a cathode, the second electrode 3 is an anode and the third electrode 5 is a cathode.
Specifically, for the film structure configuration shown in fig. 2a, the first anode 1 may be a cathode, the cathode 3 may be an anode, and the second anode 5 may be a cathode, so as to correspond to the case of common anode.
Fig. 2b is a schematic structural diagram of a bottom emission display panel according to an embodiment of the present invention.
In addition, as shown in fig. 2b, if the light emitting mode of the display panel is bottom light, the display light is emitted from the first anode 1, and accordingly, the stacked arrangement of the layers in the display panel may be the cathode 3, the organic light emitting layer 2, the first anode 1, the liquid crystal layer 4 and the second anode 5, and similarly, the liquid crystal layer 4 is also located on the outgoing light path of the display light, so that the display panel can avoid the light including UV from irradiating the internal organic layer or inorganic layer in the non-display state.
It should be understood that for the arrangement of the membrane layer structure shown in fig. 2b, the first anode 1 may be a cathode, the cathode 3 may be an anode, and the second anode 5 may be a cathode, corresponding to the case of common anode.
Fig. 3 is a schematic structural view of a display panel according to another embodiment of the present invention.
In one embodiment of the present invention, the liquid crystal layer 4 may include an inner side facing the organic light emitting layer 2, and the display panel may further include a light extraction layer 6 positioned at an outer side of the liquid crystal layer 4 and a thin film encapsulation layer 7 positioned between the liquid crystal layer 4 and the light extraction layer 6.
Specifically, as shown in fig. 3, when the light emitting mode of the display panel is top emission, the display panel may further include a thin film encapsulation layer 7 disposed between the liquid crystal layer 4 and the cathode 3 and a light extraction layer 6 that improves the light extraction rate of the display light, wherein the thin film encapsulation layer 7 is closer to the liquid crystal layer 4 than the light extraction layer 6.
Here, the thin film encapsulation layer 7 may be used to block moisture, oxygen, and the like from entering the organic light emitting layer 2 to avoid the influence of the moisture, oxygen, and the like on the devices in the organic light emitting layer 2. The light extraction layer 6 may be used to improve the light extraction rate of the display light generated by the organic light emitting layer 2. Here, the film encapsulation layer 7 and the light extraction layer 6 may be disposed on a side of the second anode 5 away from the liquid crystal layer 4, on a side of the second anode 5 close to the liquid crystal layer 4, and between the liquid crystal layer 4 and the cathode 3, and since the film encapsulation layer 7 may include an organic thin film layer and an inorganic thin film layer and the light extraction layer 6 is usually made of an organic material, in order to reduce irradiation of the film encapsulation layer 7 and the light extraction layer 6 by light including UV, the film encapsulation layer 7 and the light extraction layer 6 may be preferably disposed between the liquid crystal layer 4 and the cathode 3, thereby further reducing generation of cations or anions.
In one embodiment of the present invention, the liquid crystal layer 4 includes an outer side opposite to the organic light emitting layer 2, and the display panel further includes a cover plate disposed on the outer side of the liquid crystal layer 4. That is, the display panel may further include a cover plate disposed at a side of the liquid crystal layer 4 remote from the organic light emitting layer 2, wherein the second anode 5 may be disposed at a side of the cover plate close to the liquid crystal layer 4.
In particular, in order to protect the display light emitting devices inside the display panel, the display panel is generally provided with a cover plate for protecting the display light emitting devices. For a display panel having a cover plate, the second anode 5 may be preferably disposed on the cover plate in order to facilitate the preparation of the liquid crystal layer 4. Specifically, the liquid crystal layer 4 may specifically include a first alignment film, a liquid crystal polymer, and a second alignment film, and the liquid crystal polymer may be disposed between the first alignment film and the second alignment film, and when the cathode 3 and the second anode 5 are powered on, the first alignment film and the second alignment film control the liquid crystal polymer to be linearly aligned, so that the display light can smoothly pass through the liquid crystal layer 4. Specifically, for the structure in which the liquid crystal layer 4 is located above the thin film encapsulation layer 7, the preparation of the liquid crystal layer 4 may include plating polyvinyl alcohol (PVA) on the thin film encapsulation layer 7 and performing unidirectional rubbing with cloth to perform an alignment treatment, and at the same time, a first alignment film is formed. Then, a second anode 5 may be vapor deposited on the cover plate, and then PVA may be plated on the second anode 5, and the alignment treatment may be performed by using cloth, thereby forming a second alignment film. Then, the first alignment film and the second alignment film are opposed to each other, and a liquid crystal polymer is filled in a gap therebetween to form a liquid crystal layer 4. Here, the liquid crystal polymer may include at least one of biphenyl liquid crystal, phenylcyclohexane liquid crystal, ester liquid crystal, and the like. It should be understood that the first alignment film and the second alignment film may be prepared by evaporation or coating, and the preparation of the first alignment film and the second alignment film is not limited herein.
In one embodiment of the present invention, in order to ensure the conductive property and the light transmitting property of the second anode 5, the material used for the second anode 5 includes at least one of indium tin oxide and silver nanowires.
In one embodiment of the present invention, the display panel may further include a thin film transistor backplane, wherein the thin film transistor backplane is provided with a liquid crystal driving circuit that controls a power-on state of the second electrode 3 and the third electrode 5. In addition, the thin film transistor backplane may be further provided with a display driving circuit that controls the power-on state of the first electrode 1 and the second electrode 3, wherein both the liquid crystal driving circuit and the display driving circuit are powered by a driving power supply.
Specifically, a liquid crystal driving circuit for controlling the first anode 1 and controlling the electric field between the cathode 3 and the second anode 5 is disposed on the tft backplane. In addition, a display driving circuit for controlling an electric field between the cathode 3 and the first anode 1 may be further disposed on the tft backplane.
Here, the first anode 1 may be disposed on a tft backplane, and accordingly, a liquid crystal driving circuit and a display driving circuit may be further disposed on the tft backplane, wherein the liquid crystal driving circuit may control an electric field between the cathode 3 and the second anode 5, and further control a state of the liquid crystal layer 4; the display driver circuit may control the electric field between the cathode 3 and the first anode 1, and thus the light emission of the organic light emitting layer 2. In order to ensure that the organic light emitting layer 2 emits light and the liquid crystal layer 4 can simultaneously transmit display light smoothly, i.e. to avoid display retardation, both the liquid crystal driving circuit and the display driving circuit may be powered by the driving power supply.
Fig. 4 is a control flow diagram of a controller according to one embodiment of the invention.
In one embodiment of the present invention, the display panel may further include a controller electrically connected to the liquid crystal driving circuit and the display driving circuit, wherein the controller may be configured to:
step 310: and receiving a display opening instruction.
Specifically, the display panel may have a display button, and when the user presses the display button, a corresponding display start instruction is generated, and then the controller receives the display start instruction.
Step 320: and controlling the display driving circuit and the liquid crystal driving circuit to be simultaneously conducted according to the display starting instruction.
Specifically, the controller may determine the display driving circuit and the liquid crystal driving circuit according to the display start instruction, and control the display driving circuit and the liquid crystal driving circuit to be turned on simultaneously, thereby implementing control of display start to avoid delay of display.
Fig. 5 is a control flow diagram of a controller according to another embodiment of the present invention.
In one embodiment of the invention, the controller may be further configured to:
step 410: and receiving a display closing instruction.
Step 420: and controlling the display driving circuit and the liquid crystal driving circuit to be disconnected simultaneously according to the display closing instruction.
Similarly, the controller may also control the stopping of the display. Specifically, after the user presses the display button again, a corresponding display closing instruction is generated, and then the controller receives the display closing instruction and determines the display driving circuit and the liquid crystal driving circuit according to the display closing instruction. Here, the controller may control the display driving circuit to be turned off first, and then control the liquid crystal driving circuit to be turned off; the controller may also control the liquid crystal driving circuit to be turned off first, and then control the display driving circuit to be turned off, where the turn-off sequence is not limited. For convenience of control, and also for energy saving, the controller may also preferably control the display driving circuit and the liquid crystal driving circuit to be turned off simultaneously.
It will be appreciated that during the display, the electric field between the cathode 3 and the second anode 5 will always be present in order to avoid affecting the viewing of the display content. In order to make the electric field intensity between the cathode 3 and the second anode 5 effectively make the liquid crystal layer 4 present a regular arrangement, in an embodiment of the present invention, the voltage range of the cathode 3 may preferably be greater than or equal to-7V and less than or equal to 0V, and the voltage range of the second anode 5 may preferably be greater than or equal to 0V and less than or equal to 7V.
In one embodiment of the present invention, the display panel may further include an encapsulation layer encapsulated with a light control glass, and/or a cover plate with a light control glass.
Specifically, in order to further enhance the irradiation of the organic layer or the inorganic layer with the light including UV, in the case of a display panel in which the encapsulation layer is glass-encapsulated instead of film-encapsulated, the glass used for encapsulation may be a light control glass which is in a transparent state when energized and in a non-transparent state when not energized so as to further enhance the blocking effect of the light including UV in cooperation with the liquid crystal layer 4.
Here, whether or not the light control glass is energized may be controlled by a controller.
Similarly, for a display panel in which the second anode 5 is not on the cover plate, the cover plate may be made of glass, and in particular, a light control glass may be used to further enhance the blocking effect of the light including UV in cooperation with the liquid crystal layer 4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A display panel, comprising:
an organic light emitting layer;
the first electrode and the second electrode are electrically connected with the organic light-emitting layer and drive the organic light-emitting layer to emit light, and the polarities of the first electrode and the second electrode are opposite;
the liquid crystal layer is positioned on the light emergent side of the organic light emitting layer;
the third electrode and the second electrode are electrically connected with the liquid crystal layer and drive the liquid crystal layer to switch between a shielding state of shielding light emitted by the organic light emitting layer and a light transmitting state of transmitting the light emitted by the organic light emitting layer;
wherein the third electrode overlaps with the organic light emitting layer, and the entire liquid crystal layer is in the shielding state when the second electrode and the third electrode are not energized.
2. The display panel according to claim 1, wherein the first electrode, the organic light emitting layer, the second electrode, the liquid crystal layer, and the third electrode are stacked.
3. The display panel according to claim 1, wherein the first electrode is a cathode, the second electrode is an anode, and the third electrode is a cathode.
4. The display panel according to claim 1, wherein the liquid crystal layer includes an inner side facing the organic light emitting layer, the display panel further comprising a light extraction layer on an outer side of the liquid crystal layer and a thin film encapsulation layer between the liquid crystal layer and the light extraction layer.
5. The display panel according to claim 1, further comprising a thin film transistor backplane, wherein the thin film transistor backplane is provided with a liquid crystal driving circuit that controls a power-on state of the second electrode and the third electrode.
6. The display panel according to claim 5, wherein the thin film transistor backplane is further provided with a display driving circuit for controlling the power-on state of the first electrode and the second electrode, wherein the liquid crystal driving circuit and the display driving circuit are powered by the same driving power source.
7. The display panel of claim 6, further comprising a controller electrically connected to the liquid crystal driving circuit and the display driving circuit, wherein the controller is configured to:
receiving a display starting instruction; and
and controlling the display driving circuit and the liquid crystal driving circuit to be simultaneously conducted according to the display starting instruction.
8. The display panel of claim 7, wherein the controller is further configured to:
receiving a display closing instruction; and
and controlling the display driving circuit and the liquid crystal driving circuit to be disconnected simultaneously according to the display closing instruction.
9. The display panel according to claim 1, wherein the liquid crystal layer comprises a first alignment film, a liquid crystal polymer, and a second alignment film;
wherein the liquid crystal polymer is disposed between the first alignment film and the second alignment film;
when the second electrode and the third electrode are electrified, the first alignment film and the second alignment film control the liquid crystal polymer to be linearly arranged.
10. The display panel according to claim 2 or 3, wherein the liquid crystal layer includes an outer side opposite to the organic light emitting layer, and the display panel further comprises a cover plate disposed on the outer side of the liquid crystal layer.
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| CN110444581A (en) * | 2019-08-26 | 2019-11-12 | Oppo广东移动通信有限公司 | A kind of display screen structure and electronic equipment |
| CN110767840B (en) * | 2019-10-30 | 2022-04-26 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN113097284B (en) * | 2021-04-07 | 2024-02-02 | 京东方科技集团股份有限公司 | Display panel, display device and manufacturing method |
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