CN109904209B - Organic light emitting display panel and manufacturing method thereof - Google Patents
Organic light emitting display panel and manufacturing method thereof Download PDFInfo
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Abstract
An organic light emitting display template and a method of manufacturing the same are disclosed. The utility model provides an organic light-emitting display panel, is including the base plate, backplate, packaging layer, the solar cell layer that set gradually, still includes colored rete, and colored rete sets up between solar cell layer and top film on the direction of perpendicular to base plate, in the direction that is on a parallel with the base plate, sets up in non-luminous region. According to the technical scheme provided by the embodiment of the application, the non-light-emitting region between the solar cell layer and the top film is provided with the color film layer, so that the problem of color deviation of the display panel caused by the integration of the solar cell layer can be solved.
Description
Technical Field
The present disclosure relates generally to the field of displays, and more particularly, to organic light emitting display panels and methods of manufacture.
Background
At present, in order to eliminate the interference of external stray light, EL cathode reflected light and the like, a method of attaching a polarizer is generally adopted in the flexible OLED display, but because the polarizer has a large thickness and consumes EL light emission while eliminating the stray light, a method of replacing the polarizer is urgently needed.
The flexible OLED display screen integrated with the thin-film solar cell has a series of advantages that the thickness of the screen can be reduced, power can be supplied to the screen, and light emitting loss of an electroluminescent material is reduced. In view of the process, the feasibility of integrating the amorphous silicon thin-film solar cell with the screen is high, and particularly, the amorphous silicon thin-film solar cell can replace a polaroid to reduce the overall thickness of the screen. However, due to the characteristics of the amorphous silicon thin film, the amorphous silicon thin film has a weak absorption effect on some wavelength bands such as a red wavelength band, so that the red color of the whole screen is heavier.
Disclosure of Invention
In view of the above-mentioned drawbacks or disadvantages of the prior art, it is desirable to provide an organic light emitting display panel with normal color display and a thin thickness and a method of manufacturing the same.
In a first aspect, an organic light emitting display panel includes a substrate, a back plate, an encapsulation layer, a solar cell layer, and a top film, which are sequentially disposed, and further includes:
and the color film layer is arranged between the solar cell layer and the top film in the direction perpendicular to the substrate, and is arranged in the non-light-emitting region in the direction parallel to the substrate.
In one or more embodiments of the present application, the solar cell module further includes a touch layer, and the color film layer is disposed between the solar cell layer and the touch layer.
In one or more embodiments of the present application, the solar cell module further includes a touch layer disposed between the solar cell layer and the color film layer.
In one or more embodiments of the present application, a solar cell layer is sequentially provided with a first electrode sublayer, a PIN cell sublayer, and a second electrode sublayer.
In one or more embodiments of the present application, the color film layer is a blue film layer.
In a second aspect, a method for manufacturing an organic light emitting display panel includes a substrate, a back plate, an encapsulation layer, a solar cell layer, a top film, and a color film layer, wherein the color film layer is formed between the solar cell layer and the top film in a direction perpendicular to the substrate, and is formed in a non-light emitting region in a direction parallel to the substrate.
In one or more embodiments of the present application, a touch layer is further formed, and the color film layer is formed between the solar cell layer and the touch layer.
In one or more embodiments of the present application, a touch layer is further formed between the solar cell layer and the color film layer.
In one or more embodiments of the present application, a solar cell layer is sequentially formed with a first electrode sublayer, a PIN cell sublayer, and a second electrode sublayer.
In one or more embodiments of the present application, the color film layer is a blue film layer.
According to the technical scheme provided by the embodiment of the application, the non-light-emitting region between the solar cell layer and the top film is provided with the color film layer, so that the problem of color deviation of the display panel caused by the integration of the solar cell layer can be solved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram illustrating an exemplary trend of reflectivity of an amorphous silicon thin film according to an embodiment of the present application with respect to wavelength;
fig. 2 illustrates an exemplary structural block diagram of an organic light emitting display panel according to an embodiment of the present application;
fig. 3 illustrates an exemplary structural block diagram of an organic light emitting display panel according to another embodiment of the present application;
fig. 4 illustrates an exemplary structural block diagram of an organic light emitting display panel according to still another embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an exemplary diagram illustrating a variation trend of reflectivity of an amorphous silicon thin film with wavelength according to an embodiment of the present application is shown. The reflectivity waveform of the amorphous silicon film thickness is shown in the figure, and the reflectivity of the red light wave band D3 marked by the dotted line is higher, and the high value reaches 70%. Thus, most of the visible red light is reflected off, making the panel appear reddish. The generation of the above phenomenon is related to the characteristics of a-Si in amorphous silicon. How to solve the above problems is a problem to be solved in the demand for a display panel using a solar cell layer including an a-Si amorphous silicon thin film.
Referring to fig. 2, an exemplary structural block diagram of an organic light emitting display panel according to an embodiment of the present application is shown. As shown in the figure, the organic light-emitting display panel comprises a substrate 1, a back plate 10, an encapsulation layer 14, a solar cell layer 20 and a top film 35 which are sequentially arranged, and is characterized by further comprising a color film layer 31, wherein the color film layer is arranged between the solar cell layer 20 and the top film 35 in a direction perpendicular to the substrate, and is arranged in a non-light-emitting region D1 in a direction parallel to the substrate.
For one sub-pixel unit, the substrate 1 may be divided into a display region D2 and a non-display region D1, wherein the size of D2 of the display region is equal to the region in the backplane where the light emitting structure is disposed, and the light emitting structure is an electroluminescent device, such as an organic light emitting device or an organic light emitting diode. The light emitting structure in this embodiment is an EL layer 13 in the drawing.
In the figure, in order to distinguish the non-display region D1 and the display region D2 of each film layer, the division of each region is indicated by a dotted line. In addition, the specific color of the color film layer is set according to the characteristics of the solar cell layer 20, for example, if the reflectivity of the solar cell layer to red is high, the color film layer is a blue film layer; on the contrary, if the solar cell layer has a high reflectivity for blue, the color film layer is a red film layer.
In some embodiments, the back sheet 10 is provided with a TFT layer 12 and an EL layer 13 in this order from the substrate to the top film; the solar cell layer is provided with a first electrode layer 21, a PIN cell layer 22, and a second electrode layer 23 in this order. The PIN comprises a P-type a-Si sublayer, an intrinsic a-Si sublayer and an n-type a-Si sublayer, the first electrode layer and the second electrode layer can be a negative electrode or a positive electrode, the first electrode layer is a positive electrode when being close to the P-type a-Si sublayer, and the second electrode layer is a negative electrode when being close to the n-type a-Si sublayer.
As analyzed in fig. 1, the reflected red light component in the entire display panel will be heavier due to the effect of a-Si, which interferes with the display panel displaying normal color. At this time, a blue color film layer was provided between the solar cell layer and the top film of the non-light emitting region D1. The blue film layer can play a role in absorbing red light components, namely, the defect that the solar cell layer cannot absorb red light is made up, and the reflection and the interference of external light are reduced. Meanwhile, for the display panel using the flexible substrate of the basic 1, the total thickness including the solar cell layer 20 and the color film layer 31 can be made less than 5 micrometers, which is much less than the thickness of the general polarizer 65 micrometers. Therefore, after the combined film layer (including the solar cell layer 20 and the color film layer 31) is used for replacing the polaroid, the bending resistance of the panel is improved.
Fig. 3 illustrates an exemplary structural block diagram of an organic light emitting display panel according to another embodiment of the present application. The display panel in this embodiment further includes a touch layer 34, and the color film layer 31 is disposed between the solar cell layer 20 and the touch layer 34. The adhesive layer 32 is used for adhering the touch layer 34 and the solar cell layer 20. The lamination layer 31 may be made of oca (optical Clear adhesive) optical adhesive.
Fig. 4 illustrates an exemplary structural block diagram of an organic light emitting display panel according to still another embodiment of the present application. The display panel in this embodiment further includes a touch layer, and the touch layer 34 is disposed between the solar cell layer 20 and the color film layer 31. The color film layer 31 and the top film 35 may be bonded by using a bonding adhesive, and at this time, the light-emitting region D2 in the color film layer may also be coated by using the bonding adhesive.
The application also provides a method for manufacturing the organic light-emitting display panel, wherein the display panel comprises a substrate, a back plate, an encapsulation layer, a solar cell layer and a top film which are sequentially formed, and the display panel also comprises a color film layer, wherein the color film layer is formed between the solar cell layer and the top film in the direction perpendicular to the substrate, and is formed in a non-light-emitting area in the direction parallel to the substrate.
The above-described manufacturing process is specifically described below.
The glass substrate is initially cleaned and coated with a layer of PI (polyimide) glue to form the substrate 1. For example, at the temperature of 300-400 ℃, a PI film of about 10um is formed by curing.
The TFT layer 12 of the back plate is prepared by LTPS (Low Temperature polysilicon) technology, the EL layer 13 is prepared on the back plate by evaporation, and then the encapsulation layer 14 is formed by thin film encapsulation, where the encapsulation layer 14 may be an inorganic/organic stacked structure.
An ITO film is deposited on the packaging layer 14 to serve as a first electrode layer 21 of the amorphous silicon thin film solar cell, the thickness of the electrode is 80-100nm, a three-layer PIN structure is deposited by a low-temperature PECVD (plasma Enhanced Chemical Vapor deposition) process to form a TaiPIN layer 22, the TaiPIN layer comprises P-type a-Si, intrinsic a-Si and n-type a-Si, the thickness of each layer is about 2-3um, and PIN above a light-emitting area of the EL layer 13 is thinned to about 50-70nm through an exposure etching process. Subsequently, the deposition of the second electrode layer 23 is continued.
By the CF color film process, a blue color film with the thickness of about 1-2um is coated on the non-light-emitting area, and the absorption of the red light wave band is increased by the blue color film, so that the defect that the absorption of the amorphous silicon film to the red light wave band is insufficient can be overcome.
The top film 35 is attached by an oca (optical Clear adhesive) adhesive, and the glass substrate is separated, so that the manufacture of the display panel integrated with the amorphous silicon thin film solar cell is completed.
As shown in fig. 3, a touch layer is further formed, and a color film layer is formed between the solar cell layer and the touch layer.
Specifically, in the manufacturing process of fig. 2, after the blue color film is coated, a process of attaching the touch layer 34 by using an OCA (optical Clear adhesive) adhesive is added, and then the top film 35 is attached by using an OCA (optical Clear adhesive) adhesive, and the glass substrate is separated, so that the manufacturing of the touch display panel integrated with the amorphous silicon thin film solar cell is completed.
The application also provides another manufacturing scheme comprising a touch layer and a color film layer. As shown in fig. 4, a touch layer is further formed between the solar cell layer and the color film layer.
Specifically, the manufacturing process is a process of attaching the touch layer 34 through the OCA paste after the solar cell layer is formed in the manufacturing process of fig. 2. Then, a blue color film is coated, an OCA (optical Clear adhesive) adhesive is adopted to adhere the top film 35, the glass substrate is separated, and the manufacturing of the touch display panel integrated with the amorphous silicon thin film solar cell is completed
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. The utility model provides an organic light-emitting display panel, includes base plate, backplate, packaging layer, solar cell layer and the top film that sets gradually, its characterized in that still includes:
the color film layer is perpendicular to the direction of the substrate, is arranged between the solar cell layer and the top film, is parallel to the direction of the substrate, and is arranged in the non-light-emitting area, and the color film layer is used for absorbing light with high reflectivity of the solar cell layer.
2. The organic light-emitting display panel according to claim 1, further comprising a touch layer, wherein the color film layer is disposed between the solar cell layer and the touch layer.
3. The organic light-emitting display panel according to claim 1, further comprising a touch layer disposed between the solar cell layer and the color film layer.
4. The organic light-emitting display panel according to claim 1, wherein the solar cell layer is sequentially provided with a first electrode sublayer, a PIN cell sublayer and a second electrode sublayer, and the PIN cell sublayer comprises a-Si.
5. The organic light-emitting display panel according to claim 4, wherein the color film layer is a blue film layer.
6. The method for manufacturing the organic light-emitting display panel comprises a substrate, a back plate, an encapsulation layer, a solar cell layer and a top film which are sequentially formed, and is characterized by further comprising a color film layer, wherein the color film layer is formed between the solar cell layer and the top film in a direction perpendicular to the substrate and is formed in a non-light-emitting area in a direction parallel to the substrate, and the color film layer is used for absorbing light with high reflectivity of the solar cell layer.
7. The method of manufacturing an organic light-emitting display panel according to claim 6, wherein a touch layer is further formed, and the color film layer is formed between the solar cell layer and the touch layer.
8. The method of claim 6, further comprising forming a touch layer between the solar cell layer and the color film layer.
9. The method of manufacturing an organic light emitting display panel according to claim 6, wherein the solar cell layer is sequentially formed with a first electrode sublayer, a PIN cell sublayer and a second electrode sublayer, the PIN cell sublayer comprising a-Si.
10. The method of manufacturing an organic light emitting display panel according to claim 9, wherein the color film layer is a blue film layer.
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| US8294858B2 (en) * | 2009-03-31 | 2012-10-23 | Intel Corporation | Integrated photovoltaic cell for display device |
| WO2013112831A1 (en) * | 2012-01-25 | 2013-08-01 | Lucintech, Inc. | Intrinsically semitransparent solar cell and method of controlling transmitted color spectrum |
| CN103258841A (en) * | 2013-04-26 | 2013-08-21 | 京东方科技集团股份有限公司 | Display panel, display device and electronic device |
| CN103681774B (en) * | 2013-12-31 | 2018-11-23 | 北京维信诺科技有限公司 | A kind of OLED display of integrated solar cell |
| CN105304654A (en) * | 2015-10-29 | 2016-02-03 | 深圳市华星光电技术有限公司 | Array substrate and making method thereof |
| CN109411521A (en) * | 2018-10-31 | 2019-03-01 | 京东方科技集团股份有限公司 | Display base plate and preparation method thereof, display panel |
| CN109473463A (en) * | 2018-11-13 | 2019-03-15 | 武汉华星光电半导体显示技术有限公司 | The production method and flexible display panels of flexible display panels |
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