CN113571660A - OLED display panel and manufacturing method thereof - Google Patents
OLED display panel and manufacturing method thereof Download PDFInfo
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- CN113571660A CN113571660A CN202110775806.8A CN202110775806A CN113571660A CN 113571660 A CN113571660 A CN 113571660A CN 202110775806 A CN202110775806 A CN 202110775806A CN 113571660 A CN113571660 A CN 113571660A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 147
- 239000010410 layer Substances 0.000 claims description 188
- 239000000758 substrate Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 229920002050 silicone resin Polymers 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- 238000000206 photolithography Methods 0.000 claims description 3
- 238000005240 physical vapour deposition Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 239000011521 glass Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
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- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
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- H—ELECTRICITY
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Abstract
The invention provides an organic light-emitting diode (OLED) display panel and a manufacturing method thereof. The OLED display panel comprises a first electrode layer, an OLED light emitting layer, a second electrode layer and a light extraction layer. The OLED light emitting layer is arranged on the first electrode layer and comprises a plurality of pixels. The second electrode layer is arranged on the OLED light emitting layer. The light extraction layer is arranged on the second electrode layer and comprises a plurality of light extraction columns. Each of the plurality of light extraction columns is disposed corresponding to each of the plurality of pixels. When the display light emitted by each of the plurality of pixels enters each of the plurality of light extraction columns, the display light is totally reflected in each of the plurality of light extraction columns and is emitted from a side of each of the plurality of light extraction columns facing away from each of the plurality of pixels.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED display panel and a manufacturing method thereof.
Background
Organic light-emitting diode (OLED) display panels have advantages of wide viewing angle and wide color gamut, and are paid attention to and developed by manufacturers of large display devices as mainstream display panels. However, since the refractive index of the glass substrate in the OLED display panel is different from that of the OLED light emitting layer in the OLED display panel, a portion of the display light emitted from the OLED light emitting layer is reflected back into the OLED light emitting layer. Part of the display light cannot be emitted from the OLED display panel, so that the light emitting rate of the OLED display panel is low.
Fig. 1 is a schematic structural diagram of an OLED display panel in the prior art. The OLED display panel comprises an OLED light emitting layer 01 and glass substrates 02 arranged on the upper side and the lower side of the OLED light emitting layer 01.
When the OLED display panel displays a picture, the OLED light-emitting layer emits display light 03. Since the refractive index of the glass substrate 02 disposed on the OLED light emitting layer is different from that of the OLED light emitting layer, the display light 03 is refracted after being emitted from the OLED light emitting layer and entering the glass substrate 02.
While the display light 03 is refracted, part of the display light 03 continuously penetrates through the glass substrate 02, so that the display light 03' enters the visual field of an observer; another part of the display light 03 is reflected by the glass substrate 02, and the display light 03 ″ is reflected back into the OLED light emitting layer, and cannot enter the view of the viewer.
Compared with the display light 03, the display light 03' passing through the glass substrate 02 already loses part of energy, i.e. the light extraction efficiency of the OLED display panel is not ideal. Therefore, in order to achieve the required target brightness of the OLED display panel, more power consumption is required to drive the OLED light-emitting layer 01 to emit the display light 03 with higher energy in the prior art; further alternatively, the OLED display panel may have a reduced brightness and color gamut under the requirement of limited power consumption, so that the viewer may not obtain the desired viewing effect.
Disclosure of Invention
The invention provides an OLED display panel and a manufacturing method thereof, which can improve the light-emitting efficiency of the OLED display panel in the prior art and enable a viewer to obtain better viewing effect under the condition of providing the same energy consumption.
The OLED display panel comprises a first electrode layer, an OLED light emitting layer, a second electrode layer and a light extraction layer. The OLED light emitting layer is arranged on the first electrode layer and comprises a plurality of pixels. The second electrode layer is arranged on the OLED light emitting layer. The light extraction layer is arranged on the second electrode layer and comprises a plurality of light extraction columns. Each of the plurality of light extraction columns is disposed corresponding to each of the plurality of pixels. When the display light emitted by each of the plurality of pixels enters each of the plurality of light extraction columns, the display light is totally reflected in each of the plurality of light extraction columns and is emitted from a side of each of the plurality of light extraction columns facing away from each of the plurality of pixels.
In one embodiment, the first electrode layer is an anode layer and the second electrode layer is a cathode layer.
In one embodiment, the cross-sectional shape of each of the light extraction pillars includes rectangular, circular, or elliptical.
In one embodiment, the light extraction layer further includes a single layer structure or a multi-layer structure. The thickness of the light extraction layer is 1-1000 nanometers.
In one embodiment, the material of the light extraction layer includes silicone resin, epoxy resin, polypropylene resin, or inorganic silicon oxide composite.
The manufacturing method of the OLED display panel comprises the following steps:
forming an OLED light emitting layer on the first electrode layer, the OLED light emitting layer including a plurality of pixels;
forming a second electrode layer on the OLED light emitting layer;
forming a light extraction layer comprising a plurality of light extraction posts; and
and attaching the light extraction layer to the second electrode layer, wherein each light extraction column corresponds to each pixel.
When the display light emitted by each of the plurality of pixels enters each of the plurality of light extraction columns, the display light is totally reflected in each of the plurality of light extraction columns and is emitted from a side of each of the plurality of light extraction columns facing away from each of the plurality of pixels.
In one embodiment, the first electrode layer is an anode layer and the second electrode layer is a cathode layer.
In one embodiment, the step of forming the light extraction layer includes the steps of:
the light extraction layer is formed on the substrate through a photolithography process, a physical vapor deposition process, or a chemical vapor deposition process, wherein a cross-sectional shape formed by each of the plurality of light extraction pillars includes a rectangular shape, a circular shape, or an elliptical shape.
In one embodiment, the light extraction layer is formed of a single layer structure or a multi-layer structure. The thickness of the light extraction layer is 1-1000 nm
In one embodiment, the light extraction layer is formed of a silicone resin, an epoxy resin, a polypropylene resin, or an inorganic silicon oxide composite.
In the present invention, when the display light emitted from the OLED light-emitting layer enters the light extraction layer, the display light is totally reflected inside each of the plurality of light extraction pillars. Therefore, each of the light extraction pillars can collect the display light and guide the display light to exit from a side of each of the light extraction pillars facing away from each of the pixels, thereby improving the problem of the display light being reflected back into the OLED light emitting layer and concentrating the display light of each of the pixels. Compared with the OLED display panel in the prior art, the OLED display panel of the present invention guides most of the display light to the outside of the OLED display panel through the design of the light extraction layer, thereby having a better light extraction rate. Therefore, the light extraction layer can improve the display brightness and the display color gamut of the OLED display panel and reduce the working energy consumption of the OLED display panel; namely, under the condition of energy conservation, the invention can also bring better ornamental effect to the observer.
Drawings
Fig. 1 is a schematic structural diagram of an organic light-emitting diode (OLED) display panel in the prior art.
Fig. 2 is a schematic structural diagram of an OLED display panel according to the present invention.
FIG. 3 is a top view of a light extraction layer in an OLED display panel of the present invention.
FIG. 4 is a top view of another light extraction layer in an OLED display panel of the present invention.
Fig. 5-7 are schematic views illustrating the structure of the process for fabricating the light extraction layer in the OLED display panel according to the present invention.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
The present invention provides an organic light-emitting diode (OLED) display panel. Fig. 2 is a schematic structural diagram of an OLED display panel according to the present invention. The OLED display panel includes a first electrode layer 100, an OLED light emitting layer 200, a second electrode layer 300, and a light extraction layer 400.
The OLED light emitting layer 200 is disposed on the first electrode layer 100 and includes a plurality of pixels 210. It should be noted that, in an embodiment, the plurality of pixels 210 may be each pixel point of the OLED display panel; in another embodiment, each of the plurality of pixels 210 may further include a plurality of sub-pixels, such as a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
The second electrode layer 300 is disposed on the OLED light emitting layer 200. Through the cooperation of the first electrode layer 100 located on the lower surface of the OLED light emitting layer 200 and the second electrode layer 300 located on the upper surface of the OLED light emitting layer 200, when the OLED display panel is powered on to operate, a voltage difference is generated between the first electrode layer 100 and the second electrode layer 300, so that the plurality of pixels 210 of the OLED light emitting layer 200 emit display light 220.
As shown in fig. 2, the light extraction layer 400 and the substrate 500 are sequentially disposed on the second electrode layer 300, and the light extraction layer 400 includes a plurality of light extraction pillars 410. Each of the light extraction pillars 410 is disposed on each of the pixels 210, and corresponds to each of the pixels 210.
When the OLED display panel is powered on, when the display light 220 emitted by each of the plurality of pixels 210 of the OLED light emitting layer 200 is incident into each of the plurality of light extraction columns 410, the display light 220 is totally reflected in each of the plurality of light extraction columns 410. In this way, each of the light extraction pillars 410 can collect the display light 220 and guide the display light 220 to exit from a side of each of the light extraction pillars 410 away from each of the pixels 210, thereby improving the problem of the display light 220 being reflected back into the OLED light-emitting layer 200.
Since the display light 220 is totally reflected within each of the light extraction pillars 410, the display light 220 is not emitted from the side of each of the light extraction pillars 410. The OLED display panel of the present invention limits the display light 220 emitted from each of the plurality of pixels 210 to be between the same plurality of pixels 210 without color mixing with the adjacent plurality of pixels 210 through each of the plurality of light extraction columns 410. Therefore, the display light 220 emitted by each of the plurality of pixels 210 is concentrated, not dispersed, and not mixed in color, thereby effectively improving the display color gamut of the OLED display panel.
In the prior art, due to the difficulty of manufacturing OLED display panels, bottom-emitting OLED display panels and top-emitting OLED display panels have been developed in sequence. The main difference between the two is the relative arrangement relationship between the driving circuit and the OLED light emitting layer, and the two different configurations will cause the light emitting effect of the OLED display panel. Nowadays, the top-emitting OLED display panel has better light-emitting efficiency, and the anode layer is located at one side of the driving circuit of the OLED display panel, and the cathode layer is located at one side of the OLED display panel where light is emitted. In a preferred embodiment of the present invention, as shown in fig. 2, the OLED display panel of the present invention is the top-emitting OLED display panel, the first electrode layer is 100 anode layers, and the second electrode layer 300 is a cathode layer.
Fig. 3 is a top view of a light extraction layer 400 in the OLED display panel according to the present invention. In one embodiment, the cross-section of each of the plurality of light extraction pillars 410 of the light extraction layer 400 is shaped as a rectangle in order to match the shape of each of the plurality of pixels 210 of the OLED light emitting layer 200.
In one embodiment, when the cross-sectional shape of each of the plurality of light extraction pillars 410 is the same as the shape of each of the plurality of pixels 210, each of the plurality of light extraction pillars 410 does capture the display light 220 emitted by each of the plurality of pixels 210. Fig. 4 is a top view of another light extraction layer 400 in the OLED display panel of the present invention. By analogy, when the shape of each of the plurality of pixels 210 of the OLED light emitting layer 200 is an ellipse, the cross-sectional shape of each of the plurality of light extraction pillars 410 can also be designed to be an ellipse. In other words, the cross-sectional shape of each of the light extraction pillars 410 may be other shapes such as a circle, which are designed to match the shape of each of the pixels 210 of the OLED light emitting layer 200.
Based on the fact that the light extraction layer 400 may have tolerance problems or partial defects, the profile of each of the plurality of light extraction pillars 410 may not be able to completely match the profile of each of the plurality of pixels 210. When the profile of each of the light extraction pillars 410 exceeds the profile of each of the pixels 210, each of the light extraction pillars 410 can still capture the display light 220 emitted from each of the pixels 210, and the display effect of the OLED display panel is not affected. When the profile of each of the light extraction pillars 410 does not completely cover the profile of each of the pixels 210, a portion of the display light 220 emitted from each of the pixels 210 can still be captured by each of the light extraction pillars 410, so that the light extraction layer 400 still has a certain effect of improving the OLED display panel.
In one embodiment, the light extraction layer 400 may have a single-layer structure, which is beneficial for simplifying the manufacturing process. In another embodiment, the light extraction layer 400 may also be a multi-layer structure. The interfaces are formed by different materials with a multi-layer structure, so that the display light 220 is continuously refracted among the interfaces, and further, a better total reflection effect is generated, and the display light 220 is more efficiently guided to the visual field of an observer. Since the light extraction layers 400 with different structures have different critical angles of total reflection, the display light 220 in the light extraction layers 400 with different structures must be calculated corresponding to different light paths. Therefore, in addition to adjusting the structural design of the light extraction layer 400, the thickness of the light extraction layer 400 must also be adjusted accordingly. Preferably, the thickness of the light extraction layer 400 is 1 to 1000 nm.
Finally, in a preferred embodiment of the present invention, the material of the light extraction layer 400 includes a material with good light transmittance, such as silicone resin, epoxy resin, polypropylene resin, or inorganic silicon oxide composite material, and the corresponding material configuration is selected according to the thickness of the light extraction layer 400.
The invention also provides a manufacturing method of the OLED display panel. Referring to fig. 2, the structure of the OLED display panel is schematically illustrated, and the manufacturing method includes the following steps:
in step S1, an OLED light emitting layer 200 is formed on the first electrode layer 100, the OLED light emitting layer 200 including a plurality of pixels 210. In this step, a light emitting source of the OLED display panel, i.e., the OLED light emitting layer 200, is formed on the first electrode layer 100. It should be noted that, in an embodiment, the plurality of pixels 210 may be each pixel point of the OLED display panel; in another embodiment, each of the plurality of pixels 210 may further include a plurality of sub-pixels, such as a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
In step S2, a second electrode layer 300 is formed on the OLED light emitting layer 200. In this step, the second electrode layer 300 is formed in pair with the first electrode layer 100, and the OLED display panel is endowed with a function of controlling the display of the plurality of pixels 210.
As described above, in the prior art, the OLED display panel is divided into a bottom-emitting OLED display panel and a top-emitting OLED display panel, and the top-emitting OLED display panel has a better light emitting efficiency. The method of manufacturing the OLED display panel of the present invention preferably manufactures the top-emitting OLED display panel such that the first electrode layer is 100 anode layers and the second electrode layer 300 is a cathode layer.
According to the OLED display panel manufactured in the foregoing steps, through the cooperation of the first electrode layer 100 located on the lower surface of the OLED light emitting layer 200 and the second electrode layer 300 located on the upper surface of the OLED light emitting layer 200, when the OLED display panel is powered on and operated, a voltage difference is generated between the first electrode layer 100 and the second electrode layer 300, so that the plurality of pixels 210 of the OLED light emitting layer 200 emitting electroluminescence emit display light 220.
Step S3, a light extraction layer 400 is formed, the light extraction layer 400 including a plurality of light extraction pillars 410.
Step S4, attaching the light extraction layer 400 to the second electrode layer 300, wherein each of the light extraction pillars 410 corresponds to each of the pixels 210. In this step, it should be noted that each of the plurality of light extraction pillars 410 is attached to each of the plurality of pixels 210, and corresponds to each of the plurality of pixels 210.
When the OLED display panel is powered on, when the display light 220 emitted by each of the plurality of pixels 210 of the OLED light emitting layer 200 is incident into each of the plurality of light extraction columns 410, the display light 220 is totally reflected in each of the plurality of light extraction columns 410. In this way, each of the light extraction pillars 410 can collect the display light 220 and guide the display light 220 to exit from a side of each of the light extraction pillars 410 away from each of the pixels 210, thereby improving the problem of the display light 220 being reflected back into the OLED light-emitting layer 200.
Since the display light 220 is totally reflected within each of the light extraction pillars 410, the display light 220 is not emitted from the side of each of the light extraction pillars 410. The OLED display panel of the present invention limits the display light 220 emitted from each of the plurality of pixels 210 to be between the same plurality of pixels 210 without color mixing with the adjacent plurality of pixels 210 through each of the plurality of light extraction columns 410. Therefore, the display light 220 emitted by each of the plurality of pixels 210 is concentrated, not dispersed, and not mixed in color, thereby effectively improving the display color gamut of the OLED display panel.
Fig. 5-7 are schematic views showing the structure of the light extraction layer 400 in the OLED display panel according to the present invention. In one embodiment, in step S3, the step of forming the light extraction layer 400 includes the following steps:
in step S31, a light-transmitting layer 400' is coated on the substrate 500. As shown in fig. 5, in this step, the structure of the transparent layer 400' may be designed differently according to the actual requirement of the product. In an embodiment, the light-transmitting layer 400' may be formed in a single-layer structure, which is beneficial to simplify the manufacturing process. In a preferred embodiment of the present invention, the light extraction layer 400 is made of a material having good light transmittance, such as a silicone resin, an epoxy resin, a polypropylene resin, or an inorganic silicon oxide composite material. In another embodiment, the light-transmitting layer 400' may also be formed of a multi-layer structure. The interfaces are formed by different materials with a multi-layer structure, so that the display light 220 is continuously refracted among the interfaces, and further, a better total reflection effect is generated, and the display light 220 is more efficiently guided to the visual field of an observer. Since the light extraction layers 400 with different structures have different critical angles of total reflection, the display light 220 in the light extraction layers 400 with different structures must be calculated corresponding to different light paths. Therefore, in addition to adjusting the structural design of the light extraction layer 400, the thickness of the light extraction layer 400 must also be adjusted accordingly. Preferably, the thickness of the light extraction layer 400 is 1 to 1000 nm. And the corresponding material configuration is selected according to the thickness of the light extraction layer 400.
In step S32, the light-transmitting layer 400' is exposed through the mask 600, as shown in fig. 6.
In step S33, the light-transmitting layer 400' is developed to form the light extraction layer 400 having the plurality of light extraction pillars 410, as shown in fig. 7.
In addition to forming the light extraction layer 400 through a photolithography process using steps S32 and S33, the light extraction layer 400 may be formed on the substrate 500 through a physical vapor deposition process or a chemical vapor deposition process.
It should be noted that, when the plurality of light extraction columns 410 of the light extraction layer 400 are formed on the substrate 500, the profile of each of the plurality of light extraction columns 410 needs to be matched with the profile of each of the plurality of pixels 210. When the profile of each of the plurality of light extraction pillars 410 is the same as the profile of each of the plurality of pixels 210, each of the plurality of light extraction pillars 410 does capture the display light 220 emitted by each of the plurality of pixels 210. Therefore, the cross-sectional shape of each of the light extraction pillars 410 may be rectangular, circular, or elliptical in shape to match the shape of each of the pixels 210.
During the formation of the light extraction layer 400, the profile of each of the plurality of light extraction pillars 410 may not be able to completely conform to the profile of each of the plurality of pixels 210 due to tolerance issues or partial defects. When the profile of each of the light extraction pillars 410 exceeds the profile of each of the pixels 210, each of the light extraction pillars 410 can still capture the display light 220 emitted from each of the pixels 210, and the display effect of the OLED display panel is not affected. When the profile of each of the light extraction pillars 410 does not completely cover the profile of each of the pixels 210, a portion of the display light 220 emitted from each of the pixels 210 can still be captured by each of the light extraction pillars 410, so that the light extraction layer 400 still has a certain effect of improving the OLED display panel.
In the present invention, when the display light 220 emitted from the OLED light-emitting layer 200 enters the light extraction layer 400, the display light 220 is totally reflected inside each of the plurality of light extraction pillars 410. Therefore, each of the light extraction pillars 410 can collect the display light 220 and guide the display light 220 to exit from a side of each of the light extraction pillars 410 facing away from each of the pixels 210, thereby improving the problem of the display light 220 being reflected back into the OLED light-emitting layer 200 and concentrating the display light 220 of each of the pixels 210. Compared with the OLED display panel of the prior art, the OLED display panel of the present invention guides most of the display light 220 to the outside of the OLED display panel through the design of the light extraction layer 400, thereby having a better light extraction rate. Therefore, the light extraction layer 400 of the present invention can improve the display brightness and the display color gamut of the OLED display panel, and reduce the working energy consumption of the OLED display panel; namely, under the condition of energy conservation, the invention can also bring better ornamental effect to the observer.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. An organic light-emitting diode (OLED) display panel, comprising:
a first electrode layer;
the OLED light emitting layer is arranged on the first electrode layer and comprises a plurality of pixels;
the second electrode layer is arranged on the OLED light emitting layer; and
the light extraction layer is arranged on the second electrode layer and comprises a plurality of light extraction columns, and each light extraction column is arranged corresponding to each pixel;
when the display light emitted by each of the plurality of pixels enters each of the plurality of light extraction columns, the display light is totally reflected in each of the plurality of light extraction columns and is emitted from a side of each of the plurality of light extraction columns opposite to each of the plurality of pixels.
2. The OLED display panel of claim 1, wherein said first electrode layer is an anode layer and said second electrode layer is a cathode layer.
3. The OLED display panel of claim 1, wherein each of the plurality of light extraction posts has a cross-sectional shape that includes a rectangular, circular, or oval shape.
4. The OLED display panel of claim 1, wherein the light extraction layer further comprises a single layer structure or a multi-layer structure, and the light extraction layer has a thickness of 1-1000 nm.
5. The OLED display panel of claim 1, wherein the material of the light extraction layer comprises a silicone resin, an epoxy resin, a polypropylene resin, or an inorganic silicon oxide composite.
6. A method for manufacturing an organic light-emitting diode (OLED) display panel, comprising the steps of:
forming an OLED light emitting layer on the first electrode layer, the OLED light emitting layer including a plurality of pixels;
forming a second electrode layer on the OLED light emitting layer;
forming a light extraction layer comprising a plurality of light extraction posts; and
attaching the light extraction layer to the second electrode layer, wherein each of the plurality of light extraction columns corresponds to each of the plurality of pixels;
when the display light emitted by each of the plurality of pixels enters each of the plurality of light extraction columns, the display light is totally reflected in each of the plurality of light extraction columns and is emitted from a side of each of the plurality of light extraction columns opposite to each of the plurality of pixels.
7. The method of manufacturing an OLED display panel of claim 6 wherein said first electrode layer is an anode layer and said second electrode layer is a cathode layer.
8. The method of manufacturing an OLED display panel according to claim 6, wherein the step of forming the light extraction layer includes the steps of:
the light extraction layer is formed on the substrate through a photolithography process, a physical vapor deposition process, or a chemical vapor deposition process, wherein a cross-sectional shape formed by each of the plurality of light extraction pillars includes a rectangular shape, a circular shape, or an elliptical shape.
9. The method of manufacturing an OLED display panel according to claim 6, wherein the light extraction layer is formed of a single layer structure or a multi-layer structure, and the thickness of the light extraction layer is 1 to 1000 nm.
10. The method of manufacturing an OLED display panel according to claim 6, wherein the light extraction layer is formed of a silicone resin, an epoxy resin, a polypropylene resin, or an inorganic silicon oxide composite.
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| CN113054136A (en) * | 2021-03-11 | 2021-06-29 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting display panel and display device |
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| JP2004146122A (en) * | 2002-10-22 | 2004-05-20 | Matsushita Electric Works Ltd | Organic electroluminescent element, and light extraction body for organic electroluminescent element |
| CN110419264A (en) * | 2017-03-28 | 2019-11-05 | 索尼公司 | Display device and electronic equipment |
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Application publication date: 20211029 |