CN113066939A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113066939A CN113066939A CN202110309371.8A CN202110309371A CN113066939A CN 113066939 A CN113066939 A CN 113066939A CN 202110309371 A CN202110309371 A CN 202110309371A CN 113066939 A CN113066939 A CN 113066939A
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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
- H10K59/30—Devices specially adapted for multicolour light emission
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
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Abstract
The application discloses a display panel and a display device, the display panel is provided with a first display area and a second display area at least partially surrounding the first display area, the light transmittance of the first display area is greater than that of the second display area, the display panel comprises a substrate and a light-emitting device layer, the light-emitting device layer is formed on the substrate and comprises a first electrode layer, a light-emitting layer and a second electrode layer which are arranged in a stacking mode along the direction far away from the substrate, and the light-emitting layer comprises a first light-emitting material layer located in the first display area and a second light-emitting material layer located in the second display area; the first light-emitting material layer comprises a plurality of first sub light-emitting material layers which are arranged in a stacking mode along the direction perpendicular to the substrate, and a connecting layer is arranged between every two adjacent first sub light-emitting material layers. The first luminous display area and the second luminous display area in the display panel have small luminous intensity difference and good display effect.
Description
Technical Field
The application belongs to the technical field of display equipment, and particularly relates to a display panel and a display device.
Background
With the introduction of the concept of comprehensive screen of mobile phones, the camera under the screen becomes a big trend in the future. In the existing design, after the brightness difference between the display area opposite to the camera and other display areas in the display screen is reduced, the problem of reduction of the service life of the display screen in the area opposite to the camera area is caused.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, and the luminous intensity difference of a first luminous display area and a second luminous display area in the display panel is small, and the display effect is good.
In one aspect, an embodiment of the present application provides a display panel, which has a first display area and a second display area at least partially surrounding the first display area, where light transmittance of the first display area is greater than that of the second display area, the display panel includes a substrate and a light emitting device layer, the light emitting device layer is formed on the substrate and includes a first electrode layer, a light emitting layer, and a second electrode layer stacked in a direction away from the substrate, and the light emitting layer includes a first light emitting material layer located in the first display area and a second light emitting material layer located in the second display area;
the first light-emitting material layer comprises a plurality of first sub light-emitting material layers which are stacked along a direction perpendicular to the substrate, and a connecting layer is arranged between every two adjacent first sub light-emitting material layers.
According to an aspect of the present application, the first electrode layer includes a plurality of first electrode first subsections located in the first display area and a plurality of first electrode second subsections located in the second display area, and the second electrode layer includes a second electrode first subsection located in the first display area and a second electrode second subsection located in the second display area, the second electrode first subsection and the second electrode second subsection being insulated from each other.
According to one aspect of the application, a voltage difference between the first electrode first subsection and the second electrode first subsection is greater than a voltage difference between the first electrode second subsection and the second electrode second subsection.
According to one aspect of the application, the second electrode first subsection is connected to a first power supply terminal, the second electrode second subsection is connected to a second power supply terminal, and the first electrode first subsection and the first electrode second subsection are both connected to a third power supply terminal.
According to one aspect of the present application, the display device further includes a pixel defining layer formed on a side of the first electrode layer facing away from the substrate, the pixel defining layer including openings corresponding to the first electrode first sub-portions and the first electrode second sub-portions one to one, a plurality of layers of the first sub-emitting material layers are stacked and disposed in the openings corresponding to the first electrode first sub-portions one to one, and the second emitting material layers are disposed in the openings corresponding to the first electrode second sub-portions one to one;
preferably, the number of the first sub light emitting material layers in each opening corresponding to the first electrode first division portion is the same.
According to an aspect of the application, the second electrode first subsection and the second electrode second subsection are insulated from each other by an insulation gap formed between the second electrode first subsection and the second electrode second subsection.
According to one aspect of the application, the connecting layer is made of an organic material;
preferably, the material of articulamentum is polymer resin material, the thickness of articulamentum is 1.2um to 1.8 um.
According to one aspect of the present application, the light emitting layer further includes a hole injection layer, a hole transport layer, and an electron transport layer and an electron injection layer, which are sequentially formed on the first electrode layer, and sequentially formed on the second light emitting material layer away from one side of the substrate and on the first light emitting material layer away from one side of the substrate.
In another aspect, the present application provides a display device including any one of the display panels provided in the first aspect of the present application.
According to another aspect of this application, the display device that this application provided still including set up in display panel deviates from play plain noodles one side and with the sensitization module that first display area is relative.
Compared with the prior art, the display panel provided by the embodiment of the application comprises a substrate and light emitting device layers formed on the substrate, wherein the number of first sub-light emitting material layers in the light emitting device layer in the first display area is larger than that of second light emitting material layers in the light emitting device layer in the second display area along the direction perpendicular to the substrate, and the adjacent first sub-light emitting material layers are electrically connected through the connecting layer, so that the light emitting efficiency in the first display area can be improved, the light emitting intensity in the unit area in the area opposite to the first light emitting material layer in the display panel is larger than that in the area opposite to the second light emitting layer in the display panel, and on the premise that the light transmittance of the first display area is larger than that of the second display area, the number of the first sub-light emitting material layers stacked along the direction perpendicular to the substrate in the first display area is increased to improve the light emitting material layer in the first display area The brightness of the opposite area is reduced, so that the difference of the brightness of the first display area and the second display area is reduced, and the display effect of the display panel is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below 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 structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic sectional view of the region a-a in fig. 1.
In the drawings:
1-a substrate; 2-a first electrode first subsection; 3-a first electrode second subsection; 4-pixel circuit layer; 5-a hole injection layer; 6-a hole transport layer; 7-a first sub-luminescent material layer; 8-a second layer of luminescent material; 9-a conductive layer; 10-electron transport layer; 11-electron injection layer; 12-a second electrode first subsection; 13-second electrode second subsection.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In order to realize the full-screen display, one embodiment is to divide the display area of the display screen into a first display area and a second display area, increase the light transmittance of the first display area by reducing the density of effective light-emitting sub-pixels in the first display area, so that the light transmittance of the first display area is greater than that of the second display area, and place the camera under the first display area, so as to realize the full-screen display while satisfying the camera function, but the inventor finds that the luminance of the first display area is lower than that of the second display area after reducing the density of the effective light-emitting sub-pixels in the first display area, in the prior art, the luminance of the first display area is increased by increasing the driving current of the effective light-emitting sub-pixels in the first display area, so as to reduce the luminance difference between the first display area and the second display area, but the heat of the first display area is increased after increasing the driving current of the first display area, thereby causing the lifetime of the first display region to be reduced, and the inventors have provided a display panel and a display device based on an analysis of the above-mentioned problems.
For a better understanding of the present application, a display panel and a display device according to an embodiment of the present application will be described in detail below with reference to fig. 1 and 2.
Referring to fig. 1 to 2, an embodiment of the present application provides a display panel, which has a first display area AA1 and a second display area AA2 at least partially surrounding the first display area AA1, where the light transmittance of the first display area AA1 is greater than that of the second display area AA2, the display panel includes a substrate 1 and a light emitting device layer, the light emitting device layer is formed on the substrate 1 and includes a first electrode layer, a light emitting layer and a second electrode layer stacked in a direction away from the substrate, the light emitting layer includes a first light emitting material layer located in the first display area AA1 and a second light emitting material layer 8 located in the second display area AA2, the first light emitting material layer includes a plurality of first sub light emitting material layers 7 stacked in a direction perpendicular to the substrate, and a connection layer 9 is disposed between adjacent first sub light emitting material layers 7.
The present application provides a display panel, which includes a substrate 1 and a light emitting device layer formed on the substrate 1, wherein, in a direction perpendicular to the substrate 1, the number of first sub-emitting material layers 7 in a first emitting material layer in the light emitting device layer of a first display area AA1 is greater than the number of second emitting material layers 8 in the light emitting device layer of a second display area AA2, and adjacent first sub-emitting material layers 7 are electrically connected by a connection layer 9, so that the light emitting efficiency in the first display area AA1 can be improved, such that the light emitting intensity in a unit area in an area opposite to the first emitting material layer in the display panel is greater than the light emitting intensity in an area opposite to the second emitting layer in the display panel, and thus, on the premise that the light transmittance of the first display area AA1 is greater than the light transmittance of the second display area AA2, the number of first sub-emitting material layers 7 stacked in the first display area AA1 in the direction perpendicular to the substrate 1 is increased to improve the light emitting efficiency of the first display area AA1 The brightness of the area opposite to the first luminescent material layer in the display area AA1 is reduced, so that the difference between the brightness of the first display area AA1 and the brightness of the second display area AA2 is reduced, and the display effect of the display panel is better.
In the display panel, since the distribution density of the effective light emitting sub-pixels in the first display area AA1 is less than the distribution density of the effective light emitting sub-pixels in the second display area AA2, after the light emission intensity per unit area in the area opposite to the first light emitting material layer, that is, the light emission intensity of each sub-pixel, is increased, the light emission intensity of each sub-pixel in the first display area AA1 is greater than the light emission intensity of each sub-pixel in the second display area AA2, so that on the basis that the distribution density of the effective light emitting sub-pixels in the first display area AA1 is less than the distribution density of the effective light emitting sub-pixels in the second display area AA2, the light emission intensity of the first display area AA1 is increased by increasing the light emission intensity of each effective light emitting sub-pixel in the first display area AA1, the difference between the light emission intensities of the first display area AA1 and the second display area AA2 is reduced, and the uniformity of the light emission intensity of the display panel is improved, thereby improving the display effect of the display panel, and at the same time, not affecting the service life of the first display area AA 1.
In one possible embodiment, as shown in fig. 2, the first electrode layer includes a plurality of first electrode first sub-portions 2 located in the first display area AA1 and a plurality of first electrode second sub-portions 3 located in the second display area AA2, and the second electrode layer includes a second electrode first sub-portion 12 located in the first display area AA1 and a second electrode second sub-portion 13 located in the second display area AA2, and the second electrode first sub-portions 12 and the second electrode second sub-portions 13 are insulated from each other.
In the above embodiment, each of the first electrode first sections 2 located in the first display area AA1 and each of the first electrode second sections 3 located in the second display area AA2 are independent from each other, and the second electrode first section 12 located in the first display area AA1 and the second electrode second section 13 located in the second display area AA2 are insulated from each other, so that control of the light emitting layer located between the first electrode first section 2 and the second electrode first section 12 and control of the light emitting layer located between the first electrode second section 3 and the first electrode second section 3 may be independent from each other, so as to adjust the light emission intensities of the first display area AA1 and the second display area AA2, respectively, and reduce the difference in the light emission intensities of the first display area AA1 and the second display area AA 2.
In a possible embodiment, the second electrode first section 12 and the second electrode second section 13 are independently and separately powered, so that the selection range of the voltage difference between the second electrode first section 12 and the first electrode first section 2 can be increased, and the service life of the first display area AA1 and the second display area AA2 is not affected while the light emitting intensity of the first display area AA1 is increased. In particular, the second electrode first subsection is connected to the first supply terminal, the second electrode second subsection is connected to the second supply terminal, and both the first electrode first subsection and the first electrode second subsection are connected to the third supply terminal, so that the voltage difference between the first electrode first subsection and the second electrode first subsection and the voltage difference between the first electrode second subsection and the second electrode second subsection can be set to be different by setting the voltages of the first supply terminal and the second supply terminal to be different.
In one possible embodiment, the voltage difference between the first electrode first subsection 2 and the second electrode first subsection 12 is greater than the voltage difference between the first electrode second subsection 3 and the second electrode second subsection 13.
In the display panel provided by the present application, the plurality of first sub-emitting material layers 7 stacked in layers are disposed between the first electrode first sub-portion 2 and the second electrode first sub-portion 12 in the first display area AA1, and the adjacent first sub-emitting material layers 7 are electrically connected through the connection layer 9, so that the light emitting efficiency of the current in the first display area AA1 can be improved. In the above embodiment, the light emission intensity of the first sub light emitting material layers 7 stacked and disposed is further increased by increasing the voltage difference between the first electrode first sub portion 2 and the second electrode first sub portion 12 on both sides of the first sub light emitting material layers 7 stacked and disposed, and at the same time, since the plurality of first sub light emitting material layers 7 are stacked and disposed between the first electrode first sub portion 2 and the second electrode first sub portion 12, the influence on the service life of each first sub light emitting material layer 7 after increasing the voltage difference between the first electrode first sub portion 2 and the second electrode first sub portion 12 can be avoided.
In a possible implementation manner, the display panel provided by the present application further includes a pixel defining layer 4, the pixel defining layer 4 is formed on a side of the first electrode layer away from the substrate 1, the pixel defining layer 4 includes openings corresponding to the first electrode first sub-portions 2 and the first electrode second sub-portions 3 one to one, the plurality of first sub-light emitting material layers 7 are stacked in the openings corresponding to the first electrode first sub-portions 2 one to one, and the second light emitting material layers 8 are disposed in the openings corresponding to the first electrode second sub-portions 3 one to one.
In a possible embodiment, the number of first sub-luminescent material layers 7 in each opening corresponding to the first electrode first subsection 2 is the same.
In the above embodiment, the number of the first sub-emitting material layers 7 stacked in the openings of the pixel defining layer 4 in the first display area AA1 is the same, so that the light emission of the first display area AA1 is more uniform, and the display intensity difference in each area inside the first display area AA1 is prevented, thereby contributing to further improving the display effect of the display panel.
In a possible embodiment, the number of the first sub-luminescent material layers 7 in each opening corresponding to the first electrode first subsection 2 is plural, a connection layer 9 is arranged between adjacent first luminescent material layers 7, and the adjacent first sub-luminescent material layers 7 are connected through the connection layer 9.
In a possible embodiment, the light-emitting layer further comprises a hole injection layer 5, a hole transport layer 6, which are formed in this order on the first electrode layer, and an electron transport layer 10 and an electron injection layer 11, which are formed in this order on the side of the second light-emitting material layer 8 facing away from the substrate 1 and on the side of the first light-emitting material layer facing away from the substrate 1.
In the above embodiment, the hole injection layer 5, the hole transport layer 6, the electron transport layer 10, and the electron injection layer 11 all include a portion located in the first display area AA1 and a portion located in the second display area AA2, and the hole injection layer 5, the hole transport layer 6, the electron transport layer 10, and the electron injection layer 11 are all continuous film layers, so that each layer is formed by a one-time preparation process, and the light-emitting layer may further include an electron blocking layer and a hole blocking layer, which may be set according to actual requirements, which is not limited in this application; when the number of the first sub-emitting material layers 7 in each opening corresponding to the first electrode first subsection 2 is plural, the connection layer 9 is disposed between the adjacent first emitting material layers 7, and the adjacent first emitting material layers are connected by the connection layer, so that the plurality of first sub-emitting material layers 7 located in the same opening share the hole injection layer 5, the hole transport layer 6, the electron transport layer 10, and the electron injection layer 11 corresponding to each opening to emit light.
In one possible embodiment, the material of the connection layer 9 is an organic material, but the present application is not limited to the organic material, and preferably an organic material with good stability and good conductivity, such as a polymer resin material, and the thickness of the connection layer is 1.2um to 1.8um, specifically, the thickness of the connection layer may be 1.2um, 1.3um, 1.5um, 1.8um, and the present application is not limited thereto.
In one possible embodiment, as shown in fig. 2, the second electrode first subsection 12 and the second electrode second subsection 13 are insulated from each other by an insulating gap formed between the second electrode first subsection 12 and the second electrode second subsection 13.
In the above embodiment, the second electrode first subsection 12 and the second electrode second subsection 13 are insulated by the insulation gap, so that the manufacturing process is simple, and the process cost can be saved.
In another possible embodiment, the second electrode first subsection 12 and the second electrode second subsection 13 are insulated from each other by an insulating layer, which is arranged in the same layer as the second electrode first subsection 12 and the second electrode second subsection 13.
In the present application, the first electrode first subsection and the first electrode second subsection are anodes, and the second electrode first subsection and the second electrode second subsection are cathodes, or the first electrode first subsection and the first electrode second subsection are cathodes, and the second electrode first subsection and the second electrode second subsection are anodes, which is not limited in the present application.
The application also provides a display device, including the arbitrary display panel that this application above-mentioned embodiment provided, the luminous intensity in each region of play plain noodles is even among the display device that this application provided, and does not influence luminousness and display panel's life-span under the display effect who reaches even luminous intensity.
The application provides a still including setting up in the display panel and deviating from a plain noodles one side and the sensitization module relative with first display area AA 1.
Among the above-mentioned display device, with the sensitization module setting with the one side that first display area AA1 deviates from the display panel light-emitting surface, thereby the luminousness height of first display area AA1 can promote the effect of sensitization module better.
The photosensitive module can comprise an infrared recognition module or a camera module and the like, and the display device can be a mobile terminal such as a mobile phone and a tablet personal computer or a display device such as a display and a television and the like, and the application is not limited.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (10)
1. A display panel having a first display region and a second display region at least partially surrounding the first display region, the first display region having a light transmittance greater than a light transmittance of the second display region, the display panel comprising:
a substrate;
the light-emitting device layer is formed on the substrate and comprises a first electrode layer, a light-emitting layer and a second electrode layer which are arranged in a stacking mode along the direction far away from the substrate, and the light-emitting layer comprises a first light-emitting material layer located in the first display area and a second light-emitting material layer located in the second display area; the first light-emitting material layer comprises a plurality of first sub light-emitting material layers which are stacked along a direction perpendicular to the substrate, and a connecting layer is arranged between every two adjacent first sub light-emitting material layers.
2. The display panel according to claim 1, wherein the first electrode layer comprises a plurality of first electrode first subsections located in the first display area and a plurality of first electrode second subsections located in the second display area, and wherein the second electrode layer comprises a second electrode first subsection located in the first display area and a second electrode second subsection located in the second display area, and wherein the second electrode first subsection and the second electrode second subsection are insulated from each other.
3. The display panel of claim 2, wherein a voltage difference between the first electrode first subsection and the second electrode first subsection is greater than a voltage difference between the first electrode second subsection and the second electrode second subsection.
4. The display panel of claim 3, wherein the second electrode first subsection is connected to a first power supply terminal, the second electrode second subsection is connected to a second power supply terminal, and the first electrode first subsection and the first electrode second subsection are both connected to a third power supply terminal.
5. The display panel according to claim 2, further comprising a pixel defining layer formed on a side of the first electrode layer facing away from the substrate, the pixel defining layer including openings corresponding to the first electrode first sub-portions and the first electrode second sub-portions one to one, wherein a plurality of the first sub-emitting material layers are stacked and disposed in the openings corresponding to the first electrode first sub-portions one to one, and the second emitting material layers are disposed in the openings corresponding to the first electrode second sub-portions one to one;
preferably, the number of the first sub light emitting material layers in each opening corresponding to the first electrode first division portion is the same.
6. The display panel according to claim 2, wherein the second electrode first section and the second electrode second section are insulated from each other by an insulating gap.
7. The display panel according to claim 1, wherein the connection layer is made of an organic material;
preferably, the material of articulamentum is polymer resin material, the thickness of articulamentum is 1.2um to 1.8 um.
8. The display panel according to claim 1, wherein the light-emitting layer further comprises a hole injection layer and a hole transport layer sequentially formed on the first electrode layer, and an electron transport layer and an electron injection layer sequentially formed on a side of the second light-emitting material layer facing away from the substrate and on a side of the first light-emitting material layer facing away from the substrate.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
10. The display device according to claim 9, further comprising a photosensitive module disposed on a side of the display panel facing away from the light exit surface and opposite to the first display area.
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| CN202110309371.8A CN113066939B (en) | 2021-03-23 | 2021-03-23 | Display panel and display device |
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| CN115064648A (en) * | 2022-08-05 | 2022-09-16 | 惠科股份有限公司 | OLED display panel and display device |
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