CN113013355A - Display device and method for manufacturing the same - Google Patents

Display device and method for manufacturing the same Download PDF

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Publication number
CN113013355A
CN113013355A CN202110198898.8A CN202110198898A CN113013355A CN 113013355 A CN113013355 A CN 113013355A CN 202110198898 A CN202110198898 A CN 202110198898A CN 113013355 A CN113013355 A CN 113013355A
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layer
optical compensation
display device
encapsulation layer
compensation layer
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CN202110198898.8A
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CN113013355B (en
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王芳
黄金昌
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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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
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the application discloses a display device and a preparation method thereof, wherein the display device comprises a display panel, an inorganic packaging layer and an optical compensation layer, the inorganic packaging layer is arranged on the display panel, and the inorganic packaging layer comprises a middle area and an edge area surrounding the middle area; and in the edge region, the optical compensation layer is arranged on the inorganic packaging layer, wherein the refractive index of the optical compensation layer is 1.1-3.5. In this application, through the marginal area of inorganic encapsulation layer sets up the optical compensation layer, just, the refracting index of optical compensation layer is 1.1-3.5 to avoid because of there is the difference in the thickness of the middle zone of inorganic layer encapsulation layer and marginal area's thickness, and lead to display device appears the problem of sending powder all around, thereby has improved display device's display effect, thereby has improved display device's performance.

Description

Display device and method for manufacturing the same
Technical Field
The application relates to the technical field of display, in particular to a display device and a preparation method thereof.
Background
Organic light emitting diodes have been gaining market popularity in recent years due to their ability to be fabricated on flexible substrates. In the aspect of medium and small size, with the arrival of folding mobile phones, the development of organic light emitting diodes can enter a secondary explosion stage. However, as people continuously improve their pursuit of vision, the user's adverse effects on the taste category, such as yellowing of the screen, yin-yang of the screen, and powdering around, are increasingly unbearable.
Therefore, there is an urgent need to solve the problems of yellow screen, yin-yang screen, and powder on the periphery of the display device in the prior art, so as to improve the display performance of the display device.
Disclosure of Invention
The embodiment of the application provides a display device and a preparation method thereof, so as to improve the display performance of the display device.
An embodiment of the present application provides a display device, including:
a display panel;
an inorganic encapsulation layer disposed on the display panel, the inorganic encapsulation layer including a middle region and an edge region surrounding the middle region; and
and the optical compensation layer is arranged on the inorganic packaging layer in the edge area, wherein the refractive index of the optical compensation layer is 1.1-3.5.
Optionally, in some embodiments of the present application, an upper surface of the optical compensation layer is provided with a microstructure.
Optionally, in some embodiments of the present application, the optical compensation layer is further disposed on a middle region of the inorganic encapsulation layer, and the display device further includes a first touch pad; in the middle area, the first touch pad is disposed on the inorganic encapsulation layer.
Optionally, in some embodiments of the present application, the thickness of the optical compensation layer increases in a direction from the middle region to the edge region within the edge region.
Optionally, in some embodiments of the present application, a thickness of the optical compensation layer increases in a direction from the middle region to the edge region within the middle region.
Optionally, in some embodiments of the present application, a thickness of the inorganic encapsulation layer decreases in a direction from the middle region to the edge region.
Optionally, in some embodiments of the present application, a sum of a thickness of the optical compensation layer located in the edge region and a thickness of the inorganic encapsulation layer located in the edge region is a first thickness, a sum of a thickness of the optical compensation layer located in the middle region and a thickness of the inorganic encapsulation layer located in the middle region is a second thickness, and the first thickness is equal to the second thickness.
Optionally, in some embodiments of the present application, the optical compensation layer is further disposed on a middle region of the inorganic encapsulation layer, and the display device further includes a first touch pad; in the middle area, the first touch pad is disposed on the inorganic encapsulation layer.
Correspondingly, the embodiment of the application also provides a preparation method of the display device, which comprises the following steps:
providing a display panel;
forming an inorganic encapsulation layer on the display panel, the inorganic encapsulation layer including a middle region and an edge region surrounding the middle region;
and forming an optical compensation layer on the inorganic packaging layer in the edge area.
Optionally, in some embodiments of the present application, the optical compensation layer is disposed on the inorganic encapsulation layer of the edge region and the middle region; after the step of forming an optical compensation layer on the inorganic encapsulation layer in the edge region, the method further comprises:
and forming a first touch pad on the optical compensation layer in the middle area.
Optionally, in some embodiments of the present application, after the step of forming an optical compensation layer on the inorganic encapsulation layer in the edge region, the method further includes:
forming a planarization layer on the inorganic encapsulation layer and the optical compensation layer; and
and forming a first touch pad on the flat layer in the middle area.
The embodiment of the application discloses a display device and a preparation method thereof, wherein the display device comprises a display panel, an inorganic packaging layer and an optical compensation layer, the inorganic packaging layer is arranged on the display panel, and the inorganic packaging layer comprises a middle area and an edge area surrounding the middle area; and in the edge region, the optical compensation layer is arranged on the inorganic packaging layer, wherein the refractive index of the optical compensation layer is 1.1-3.5. In this application, through the marginal area of inorganic encapsulation layer sets up the optical compensation layer, just, the refracting index of optical compensation layer is 1.1-3.5 to avoid because of there is the difference in the thickness of the middle zone of inorganic layer encapsulation layer and marginal area's thickness, and lead to display device appears the problem of sending powder all around, thereby has improved display device's display effect, thereby has improved display device's performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a first structure of a display device provided in an embodiment of the present application.
Fig. 2 is a schematic cross-sectional view of a second structure of a display device provided in an embodiment of the present application.
Fig. 3 is a schematic cross-sectional view of a third structure of a display device provided in an embodiment of the present application.
Fig. 4 is a schematic cross-sectional view of a fourth structure of a display device provided in an embodiment of the present application.
Fig. 5 is a schematic cross-sectional view of a fifth structure of a display device provided in an embodiment of the present application.
Fig. 6 is a schematic flow chart of a manufacturing method of a display device provided in an embodiment of the present application.
Fig. 7 to 10 are schematic cross-sectional views illustrating structures in a process of manufacturing the display device provided in fig. 1 by using a method of manufacturing the display device provided in an embodiment of the present application.
Fig. 11 to 13 are schematic cross-sectional views illustrating structures in a process of manufacturing the display device provided in fig. 5 using a method of manufacturing the display device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The embodiment of the application provides a display device and a preparation method thereof. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Referring to fig. 1, fig. 1 is a cross-sectional view illustrating a first structure of a display device according to an embodiment of the present disclosure. The present application provides a display device 10. The display device 10 includes a display panel 100, an inorganic encapsulation layer 200, and an optical compensation layer 300. The display device 10 is described specifically as follows:
the display panel 100 includes an array structure layer 110, a pixel defining layer 120, a light emitting layer 130, and a bank 140. The display panel 100 has a first display area 101 and a second display area 102 surrounding the first display area 101. In the first display region 101, the pixel defining layer 120 includes a pixel defining part 121. The pixel defining parts 121 are arranged on the array structure layer 110 in an array. The light emitting layer 130 is disposed between the pixel defining parts 121. The light emitting layer 130 includes a first light emitting portion 131, a second light emitting portion 132, and a third light emitting portion 133. The second light emitting portion 132 is located between the first light emitting portion 131 and the third light emitting portion 133. The first light-emitting portion 131, the second light-emitting portion 132, and the third light-emitting portion 133 are selected from a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion. The first light-emitting portion 131, the second light-emitting portion 132, and the third light-emitting portion 133 are different in color from each other. In the second display region 102, the retaining wall 140 is disposed on the array structure layer 110.
In one embodiment, the display device 10 further includes a bottom encapsulation layer 400. The bottom encapsulation layer 400 covers the array structure layer 110, the pixel defining layer 120, the light emitting layer 130 and the dam 140. The bottom encapsulation layer 400 is used to protect the display panel 100 and prevent the display panel 100 from being corroded by water and oxygen, so as to prolong the service life of the display device 10 and improve the performance of the display device 10.
In one embodiment, the refractive index of the bottom encapsulation layer 400 is 0.8-2.7. The material of the bottom encapsulation layer 400 includes one or a combination of SiON, SiN and SiO.
In one embodiment, the display device 10 further includes an organic encapsulation layer 500. The organic encapsulation layer 500 is disposed on the bottom encapsulation layer 400. The organic encapsulation layer 500 is located in the region surrounded by the retaining wall 140. The organic encapsulation layer 500 material includes one or more combinations of acrylic, polycarbonate, and polystyrene. The organic encapsulation layer 500 serves to slowly release stress in the bottom encapsulation layer 400 and the inorganic encapsulation layer 200, thereby enhancing flexibility of the display device 10 and further improving performance of the display device 10.
The organic encapsulation layer 500 is used to protect the display panel 100 and prevent the display panel 100 from being corroded by water and oxygen, so as to prolong the service life of the display device 10 and improve the performance of the display device 10.
The inorganic encapsulation layer 200 is disposed on the display panel 100. The inorganic encapsulation layer 200 includes a middle region 201 and an edge region 202 surrounding the middle region 201.
Specifically, the inorganic encapsulation layer 200 covers the bottom encapsulation layer 400 and the organic encapsulation layer 500. The edge region 202 has a range L of 0.1 mm to 10 mm. The range L of the edge region 202 refers to a distance between a side of the inorganic encapsulation layer 200 close to the middle region 201 to a side of the inorganic encapsulation layer 200 far from the middle region 201. The inorganic encapsulation layer 200 is used to protect the display panel 100 and prevent the display panel 100 from being corroded by water and oxygen, so as to prolong the service life of the display device 10 and improve the performance of the display device 10.
In one embodiment, the thickness H of the inorganic encapsulation layer 200 decreases in a direction from the middle region 201 to the edge region 202.
The bottom encapsulation layer 400, the organic encapsulation layer 500 and the inorganic encapsulation layer 200 form an encapsulation module 599 of the display device 10, and the encapsulation module 599 is used for preventing the display panel 100 from being corroded by water and oxygen, so that the service life of the display device 10 is prolonged, and the performance of the display device 10 is improved.
In the edge region 202, the optical compensation layer 300 is disposed on the inorganic encapsulation layer 200. The refractive index of the optical compensation layer 300 is 1.1 to 3.5.
In an embodiment, the refractive index of the optical compensation layer 300 may be 1.2, 1.5, 1.7, 1.8, 2.1, 2.4, 2.8, or 3.1, etc.
In one embodiment, the optical compensation layer 300 may be one layer or multiple layers.
In one embodiment, the material of the optical compensation layer 300 includes one or a combination of organic and inorganic materials.
In one embodiment, the material of the optical compensation layer 300 includes one or a combination of two of SiON and SiN.
In an embodiment, the thickness D of the optical compensation layer 300 increases in a direction from the middle region 201 to the edge region 202 within the edge region 202.
In the present application, the optical compensation layer 300 is disposed in the edge region 202 of the inorganic encapsulation layer 200, and the thickness of the optical compensation layer 300 is adjusted by the refractive index of the optical compensation layer 300, for example, when the refractive index of the optical compensation layer 300 is high, the thickness of the optical compensation layer 300 located in the edge region 202 is set to be small, so as to avoid the phenomenon that the inorganic encapsulation layer 200 generates powder around the display device 10 due to the fact that the edge region 202 is too thin, that is, the inorganic encapsulation layer 200 of the edge region 202 is compensated by combining the two, thereby avoiding the problem that the powder generates around the display device 10, further improving the display effect of the display device 10, and further improving the performance of the display device 10.
In one embodiment, the optical compensation layer 300 is further disposed on the middle region 201 of the inorganic encapsulation layer 200. The display device 10 further includes a first touch pad 600. In the middle region 201, the first touch pad 600 is disposed on the inorganic encapsulation layer 200.
In an embodiment, the thickness of the optical compensation layer 300 increases within the middle region 201 in a direction from the middle region 201 to the edge region 202.
In one embodiment, the sum of the heights of the display panel 100 in the second display region 102, the bottom encapsulation layer 400 on the display panel 100 in the second display region 102, the organic encapsulation layer 500 on the display panel 100 in the second display region 102, the inorganic encapsulation layer 200 on the display panel 100 in the second display region 102, and the optical compensation layer 300 in the edge region 202 is the first height T1. The sum of the heights of the display panel 100 in the first display region 101, the bottom encapsulation layer 400 on the display panel 100 in the first display region 101, the organic encapsulation layer 500 on the display panel 100 in the first display region 101, the inorganic encapsulation layer 200 on the display panel 100 in the first display region 101, and the optical compensation layer 300 in the edge region 202 is a second height T2. First height T1Is less than the second height T2. Namely, the vertical cross-sectional shapes of the optical compensation layer 300 of the edge region 202 and the optical compensation layer 300 of the middle region 201 are step shapes.
In one embodiment, the display device 10 further includes an insulating layer 700. The insulating layer 700 covers the optical compensation layer 300 and the first touch pad 600. The insulating layer 700 includes a via 701. The via hole 701 penetrates the insulating layer 700 to expose the first touch pad 600.
In one embodiment, the display device 10 further includes a second touch pad 800. The second touch pad 800 is disposed on the insulating layer 700. The second touch pad 800 extends into the through hole 701 to be electrically connected to the first touch pad 600. The second touch pad 800 is located on the first touch pad 600.
In one embodiment, the display device 10 further includes a protective layer 900. The protection layer 900 covers the insulation layer 700 and the second touch pad 800. The protective layer 900 is used to block water and oxygen, so as to prevent the water and oxygen from eroding the first touch pad 600 and the second touch pad 800, thereby improving the performance of the display device 10.
The optical compensation layer 300, the first touch pad 600, the insulating layer 700, the second touch pad 800 and the protection layer 900 form a touch module 999 of the display device 10.
In the present application, the optical compensation layer 300 may be used to compensate the inorganic encapsulation layer 200 of the edge region 202, so as to avoid the situation that the periphery of the display device 10 is dusted due to the thinness of the inorganic encapsulation layer 200 of the edge region 202, thereby improving the display performance of the display device 10; the optical compensation layer 300 only changes the thickness of the edge region 202 of the inorganic packaging layer 200, and does not affect the performance of the touch module 999, thereby reducing the cost of the display device 10.
Referring to fig. 2, fig. 2 is a schematic cross-sectional view of a second structure of a display device according to an embodiment of the present disclosure. The second structure differs from the first structure in that:
the sum of the thickness D of the optical compensation layer 300 in the edge region 202 and the thickness H of the inorganic encapsulation layer 200 in the edge region 202 is a first thickness W1. The sum of the thickness D of the optical compensation layer 300 in the middle region 201 and the thickness H of the inorganic encapsulation layer 200 in the middle region 201 is a second thickness W2A first thickness W1And a second thickness W2Are equal.
In the present application, by applying a first thickness W1Is set to the second thickness W2And the cost of the display device 10 is reduced while the problem of dusting around the display device 10 is further avoided.
Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a third structure of a display device according to an embodiment of the present disclosure. The third structure differs from the first structure in that:
the upper surface 301 of the optical compensation layer 300 is provided with microstructures 310.
In the present application, the microstructures 310 are disposed on the upper surface 301 of the optical compensation layer 300, so as to improve the light of the edge region 202, and further improve the display performance of the display device 10, and further improve the performance of the display device 10.
Referring to fig. 4, fig. 4 is a schematic cross-sectional view illustrating a fourth structure of a display device according to an embodiment of the present disclosure. The fourth structure differs from the first structure in that:
the optical compensation layer 300 is disposed only on the inorganic encapsulation layer 200 of the edge region 202. The display device 10 also includes a planarization layer 1000. The planarization layer 1000 covers the inorganic encapsulation layer 200 and the optical compensation layer 300. In the middle region 201, the first touch pad 800 is disposed on the planarization layer 1000.
Referring to fig. 5, fig. 5 is a schematic cross-sectional view illustrating a fifth structure of a display device according to an embodiment of the present disclosure. The fifth structure is different from the first structure in that:
the step shape of the vertical cross-section of the optical compensation layer 300 in fig. 5 is different from that of the vertical cross-section in fig. 1, i.e., the first height T1Greater than the second height T2。
The application provides a display device 10, through set up optical compensation layer 300 on the marginal zone 202 at inorganic encapsulation layer 200 to the thickness of optical compensation layer 300 is adjusted to the refracting index through optical compensation layer 300, thereby realizes the compensation to the inorganic encapsulation layer 200 of marginal zone 202, and then avoids display device 10 the problem of appearing sending powder all around, and then has improved display device 10's display effect, and then has improved display device 10's performance.
Referring to fig. 6 and fig. 7 to 10, fig. 6 is a schematic flow chart illustrating a method for manufacturing a display device according to an embodiment of the present disclosure. Fig. 7 to 10 are schematic cross-sectional views illustrating structures in a process of manufacturing the display device provided in fig. 1 by using a method of manufacturing the display device provided in an embodiment of the present application. The application provides a preparation method of a display device, which is specifically described as follows:
b11, providing a display panel.
Referring to fig. 7, in particular, the display panel 100 includes an array structure layer 110, a pixel defining layer 120, a light emitting layer 130 and a bank 140. The display panel 100 includes a first display region 101 and a second display region 102 surrounding the first display region 101. In the first display region 101, the pixel defining layer 120 includes a pixel defining part 121. The pixel defining parts 121 are arranged on the array structure layer 110 in an array. The light emitting layer 130 is disposed between the pixel defining parts 121. The light emitting layer 130 includes a first light emitting portion 131, a second light emitting portion 132, and a third light emitting portion 133. The second light emitting portion 132 is located between the first light emitting portion 131 and the third light emitting portion 133. The first light-emitting portion 131, the second light-emitting portion 132, and the third light-emitting portion 133 are selected from among a red light-emitting portion, a green light-emitting portion, and a blue light-emitting portion. The first light-emitting portion 131, the second light-emitting portion 132, and the third light-emitting portion 133 are different in color from each other. In the second display region 102, the retaining wall 140 is disposed on the array structure layer 110.
In an embodiment, after step B11, the method further includes:
the bottom encapsulation layer 400 is formed on the array structure layer 110, the pixel defining layer 120, the light emitting layer 130 and the dam 140 by using a chemical vapor deposition process. The bottom encapsulation layer 400 is used to protect the display panel 100 and prevent the display panel 100 from being corroded by water and oxygen, so as to prolong the service life of the display device 10 and improve the performance of the display device 10.
In one embodiment, after the step of forming the bottom encapsulation layer 400 on the array structure layer 110, the pixel definition layer 120, the light emitting layer 130 and the retaining wall 140, the method further includes:
the organic encapsulation layer 500 is formed on the bottom encapsulation layer 400 using an inkjet printing process. The organic encapsulation layer 500 is located in the region surrounded by the retaining wall 140. The organic encapsulation layer 500 material includes one or more combinations of acrylic, polycarbonate, and polystyrene. The organic encapsulation layer 500 serves to slowly release stress in the bottom encapsulation layer 400 and the inorganic encapsulation layer 200, thereby enhancing flexibility of the display device 10 and further improving performance of the display device 10.
And B12, forming an inorganic packaging layer on the display panel, wherein the inorganic packaging layer comprises a middle area and an edge area surrounding the middle area.
Referring to fig. 7, in particular, the inorganic encapsulation layer 200 is formed on the bottom encapsulation layer 400 and the organic encapsulation layer 500 by using a chemical vapor deposition process. The edge region 202 has a range L of 0.1 mm to 10 mm. The range L of the edge region 202 refers to a distance between a side of the inorganic encapsulation layer 200 close to the middle region 201 to a side of the inorganic encapsulation layer 200 far from the middle region 201.
In one embodiment, the thickness H of the inorganic encapsulation layer 200 decreases in a direction from the middle region 201 to the edge region 202.
The bottom encapsulation layer 400, the organic encapsulation layer 500 and the inorganic encapsulation layer 200 form an encapsulation module 599 of the display device 10, and the encapsulation module 599 is used for preventing the display panel 100 from being corroded by water and oxygen, so that the service life of the display device 10 is prolonged, and the performance of the display device 10 is improved.
B13, forming an optical compensation layer on the inorganic encapsulation layer in the edge area.
Referring to fig. 8-10, specifically, a material of the optical compensation layer 300 is disposed on the inorganic encapsulation layer 200 to form a pre-fabricated optical compensation layer 399, and then the pre-fabricated optical compensation layer 399 is patterned to form the optical compensation layer 300 through a photolithography process or an etching process. The refractive index of the optical compensation layer 300 is 1.1 to 3.5.
In one embodiment, the sum of the heights of the display panel 100 in the second display region 102, the bottom encapsulation layer 400 on the display panel 100 in the second display region 102, the organic encapsulation layer 500 on the display panel 100 in the second display region 102, the inorganic encapsulation layer 200 on the display panel 100 in the second display region 102, and the optical compensation layer 300 in the edge region 202 is the first height T1. The sum of the heights of the display panel 100 in the first display region 101, the bottom encapsulation layer 400 on the display panel 100 in the first display region 101, the organic encapsulation layer 500 on the display panel 100 in the first display region 101, the inorganic encapsulation layer 200 on the display panel 100 in the first display region 101, and the optical compensation layer 300 in the middle region 201 is a second height T2. First height T1Is less than the second height T2. Namely, the vertical cross-sectional shapes of the optical compensation layer 300 of the edge region 202 and the optical compensation layer 300 of the middle region 201 are step shapes.
In an embodiment, the refractive index of the optical compensation layer 300 may be 1.2, 1.5, 1.7, 1.8, 2.1, 2.4, 2.8, or 3.1, etc.
In one embodiment, the optical compensation layer 300 may be one layer or multiple layers.
In one embodiment, the material of the optical compensation layer 300 includes one or a combination of organic and inorganic materials.
In one embodiment, the material of the optical compensation layer 300 includes one or a combination of two of SiON and SiN.
In one embodiment, the optical compensation layer 300 is also formed on the inorganic encapsulation layer 200 of the middle region 201.
Referring to fig. 9, in an embodiment, after the step B13, the method further includes:
in the middle region 201, a first touch pad 600 is formed on the optical compensation layer 300.
In another embodiment, after step B13, the method further includes:
a planarization layer is formed on the inorganic encapsulation layer 200 and the optical compensation layer 300.
In the middle region 202, a first touch pad 600 is formed on the planarization layer.
In an embodiment, in the middle area 201, after the step of forming the first touch pad 600 on the optical compensation layer 300, the method further includes:
an insulating layer 700 is formed on the chemical compensation layer 300 and the first touch pad 600. The insulating layer 700 includes a via 701. The via hole 701 penetrates the insulating layer 700 to expose the first touch pad 600.
A second touch pad 800 is disposed on the insulating layer 700. The second touch pad 800 extends into the through hole 701 to be electrically connected to the first touch pad 600, and the second touch pad 800 is located on the first touch pad 600.
In an embodiment, after the step of disposing the second touch pad 800 on the insulating layer 700, the method further includes:
a protection layer 900 is formed on the insulating layer 700 and the second touch pad 800. The protective layer 900 is used to block water and oxygen, so as to prevent the water and oxygen from eroding the first touch pad 600 and the second touch pad 800, thereby improving the performance of the display device 10.
The optical compensation layer 300, the first touch pad 600, the insulating layer 700, the second touch pad 800 and the protection layer 900 form a touch module 999 of the display device 10.
Referring to fig. 11 to 13, fig. 11 to 13 are schematic structural cross-sectional views illustrating a process of manufacturing the display device provided in fig. 5 by using a method of manufacturing the display device provided in an embodiment of the present application. The difference between the second structure cross-section flow diagram and the first structure cross-section flow diagram is that:
disposing the optical compensation layer 300 material on the inorganic encapsulation layer 200 to form a pre-fabricated optical compensation layer 399, and then patterning the pre-fabricated optical compensation layer 399 to form the optical compensation layer 300 through a yellow light process or an etching process, the step shape forming the vertical cross-section of the optical compensation layer 300 is different, i.e., the first height T1Greater than the second height T2。
The application provides a display device's preparation method, through set up optical compensation layer 300 on inorganic encapsulation layer 200, make it both can compensate the inorganic encapsulation layer 200 of marginal zone 202, can set up other structures of touch-control module 999 on the inorganic encapsulation layer 200 of middle part area 201 again, promptly, when making touch-control module 999 have the compensation effect, do not influence touch-control module 999 performance again, and, preparation simple process, reduction in production cost shortens production cycle.
The embodiment of the application discloses a display device and a preparation method thereof, wherein the display device comprises a display panel, an inorganic packaging layer and an optical compensation layer, the inorganic packaging layer is arranged on the display panel, and the inorganic packaging layer comprises a middle area and an edge area surrounding the middle area; and in the edge region, the optical compensation layer is arranged on the inorganic packaging layer, wherein the refractive index of the optical compensation layer is 1.1-3.5. In this application, through the marginal area of inorganic encapsulation layer sets up the optical compensation layer, just, the refracting index of optical compensation layer is 1.1-3.5 to avoid because of there is the difference in the thickness of the middle zone of inorganic layer encapsulation layer and marginal area's thickness, and lead to display device appears the problem of sending powder all around, thereby has improved display device's display effect, thereby has improved display device's performance.
The display device and the manufacturing method thereof provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are explained herein by applying specific examples, and the description of the embodiments above is only used to help understanding the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A display device, comprising:
a display panel;
an inorganic encapsulation layer disposed on the display panel, the inorganic encapsulation layer including a middle region and an edge region surrounding the middle region; and
and the optical compensation layer is arranged on the inorganic packaging layer in the edge area, wherein the refractive index of the optical compensation layer is 1.1-3.5.
2. The display device according to claim 1, wherein an upper surface of the optical compensation layer is provided with a microstructure.
3. The display device according to claim 1, wherein the optical compensation layer is further disposed on a middle region of the inorganic encapsulation layer, the display device further comprising a first touch pad; in the middle area, the first touch pad is disposed on the inorganic encapsulation layer.
4. A display device as claimed in claim 3, characterized in that the thickness of the optical compensation layer increases in the direction from the middle region to the edge region in the edge region.
5. A display device as claimed in claim 4, characterized in that the thickness of the optical compensation layer increases in the direction from the middle region to the edge region in the middle region.
6. The display device according to claim 5, wherein the thickness of the inorganic encapsulation layer decreases in a direction from the middle region to the edge region.
7. The display device according to claim 6, wherein the sum of the thickness of the optical compensation layer in the edge region and the thickness of the inorganic encapsulation layer in the edge region is a first thickness, and the sum of the thickness of the optical compensation layer in the middle region and the thickness of the inorganic encapsulation layer in the middle region is a second thickness, and wherein the first thickness is equal to the second thickness.
8. A method of manufacturing a display device, comprising:
providing a display panel;
forming an inorganic encapsulation layer on the display panel, the inorganic encapsulation layer including a middle region and an edge region surrounding the middle region;
and forming an optical compensation layer on the inorganic packaging layer in the edge area.
9. The method of manufacturing according to claim 8, wherein the optical compensation layer is provided on the inorganic encapsulation layer of the edge region and the middle region; after the step of forming an optical compensation layer on the inorganic encapsulation layer in the edge region, the method further comprises:
and forming a first touch pad on the optical compensation layer in the middle area.
10. The method of claim 8, further comprising, after the step of forming an optical compensation layer on the inorganic encapsulation layer in the edge region:
forming a planarization layer on the inorganic encapsulation layer and the optical compensation layer; and
and forming a first touch pad on the flat layer in the middle area.
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CN108828826A (en) * 2018-06-15 2018-11-16 厦门天马微电子有限公司 The manufacturing method of curved face display panel and curved face display panel
CN109920938A (en) * 2019-03-26 2019-06-21 京东方科技集团股份有限公司 OLED display panel and OLED display
CN111668281A (en) * 2020-07-02 2020-09-15 武汉华星光电半导体显示技术有限公司 OLED display panel and OLED display device

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CN108682751A (en) * 2018-05-17 2018-10-19 武汉华星光电半导体显示技术有限公司 OLED display panel and preparation method thereof, OLED display
CN108828826A (en) * 2018-06-15 2018-11-16 厦门天马微电子有限公司 The manufacturing method of curved face display panel and curved face display panel
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