CN-122028620-A - Display panel, preparation method and display device

CN122028620ACN 122028620 ACN122028620 ACN 122028620ACN-122028620-A

Abstract

The invention provides a display panel, a preparation method and a display device. The display panel comprises a substrate, an isolation structure, a plurality of light emitting devices, a filling layer and a packaging layer. The isolation structure is positioned on the substrate and surrounds the substrate to form a plurality of first openings, and at least part of the light emitting devices are exposed out of the first openings. The packaging layer is located one side of the light-emitting device, which is away from the substrate, and the packaging layer comprises a plurality of packaging units which are arranged corresponding to the light-emitting device, wherein each packaging unit comprises a shielding part, the shielding parts are located one side of the isolation structure, which is away from the substrate, and the shielding parts are arranged at intervals with the isolation structure. The filling layer is located one side that isolation structure deviates from the base plate, and the filling layer sets up with isolation structure contact and sets up with shielding part interval, and the orthographic projection of filling layer at the base plate is located the orthographic projection of encapsulation unit at the base plate. The present invention prevents moisture from penetrating into the light emitting device by retaining a portion of the filling layer.

Inventors

ZENG WENYU
CHEN ZONGZHI
Bao Shundong
ZHANG JINGPING

Assignees

合肥维信诺科技有限公司

Dates

Publication Date: 20260512
Application Date: 20241111

Claims (15)

1. A display panel, comprising: A substrate; the isolation structure is positioned on the substrate and surrounds the substrate to form a plurality of first openings; a plurality of light emitting devices on the substrate, at least a portion of the light emitting devices being exposed by the first opening; The packaging layer is positioned on one side, away from the substrate, of the light-emitting device, the packaging layer comprises a plurality of packaging units, the packaging units are arranged in one-to-one correspondence with the light-emitting devices, the packaging units cover the light-emitting devices and extend to one side, away from the substrate, of the isolation structure, the packaging units comprise shielding parts, the shielding parts are positioned on one side, away from the substrate, of the isolation structure, and the shielding parts are arranged at intervals with the isolation structure; The filling layer is positioned on one side, deviating from the substrate, of the isolation structure, the filling layer is in contact with the isolation structure and is arranged at intervals with the shielding part, and the orthographic projection of the filling layer on the substrate is positioned in the orthographic projection of the packaging unit on the substrate.
2. The display panel of claim 1, wherein the light emitting device comprises: A first electrode arranged on one side of the substrate, The luminous functional layer is arranged on one side of the first electrode, which is away from the substrate, The second electrode is arranged on one side of the light-emitting functional layer, which is away from the substrate, and is overlapped with the isolation structure; Preferably, the material of the filling layer is the same as the material of the light emitting functional layer; preferably, the filling layer and the light-emitting functional layer are arranged on the same layer.
3. The display panel of claim 1, wherein, The packaging unit further comprises a main body part, wherein the main body part extends from the surface of the light-emitting device, which faces away from the substrate, to cover the side wall of the first opening and is connected with the shielding part; Preferably, a first gap is arranged between two adjacent packaging units; preferably, the filling layer includes a plurality of filling portions, the filling portions are disposed around the corresponding light emitting devices, and the first gap is located between two adjacent filling portions.
4. The display panel of claim 3, wherein, The light emitting device comprises a first light emitting device, a second light emitting device and a third light emitting device which emit light rays with different colors, and materials of the light emitting functional layers in the first light emitting device, the second light emitting device and the third light emitting device are at least partially different; preferably, the filling part includes: A first filling part which is arranged around the first light emitting device, wherein the material of the first filling part is the same as that of the light emitting functional layer in the first light emitting device; A second filling part which is arranged around the second light-emitting device, and the material of the second filling part is the same as that of the light-emitting functional layer in the second light-emitting device; and a third filling part which is arranged around the third light emitting device, wherein the material of the third filling part is the same as that of the light emitting functional layer in the third light emitting device.
5. The display panel of claim 2, further comprising: The pixel defining layer is arranged on one side of the substrate and surrounds a plurality of second openings formed, and the second openings are communicated with the corresponding first openings; a portion of the first electrode is located between the pixel defining layer and the substrate, and another portion is exposed from the corresponding second opening; preferably, the orthographic projection of the filler layer on the substrate is located within the orthographic projection of the pixel defining layer on the substrate.
6. The display panel of claim 2, wherein the isolation structure comprises: A partition portion provided on one side of the substrate; The crown part is arranged on one side of the partition part, which is away from the substrate, and the filling part is arranged on one side of the crown part, which is away from the substrate; preferably, the material of the partition and the crown comprises a metallic material; preferably, a second gap is formed between the shielding part and the crown part, and the filling layer is positioned in the second gap.
7. The display panel of claim 6, wherein, The orthographic projection of the partition part on the substrate is positioned in the orthographic projection of the crown part on the substrate; The edge of the orthographic projection of the second electrode on the substrate is positioned in the orthographic projection of the partition part on the substrate; Preferably, a side of the crown facing the first opening protrudes from the partition; Preferably, the second electrode extends from a surface of the light-emitting functional layer facing away from the substrate onto a surface of the partition facing the first opening.
8. A method for manufacturing a display panel, comprising: Providing a substrate; forming an isolation functional film layer on one side of the substrate, and carrying out a patterning process on the isolation functional film layer to form an isolation structure, wherein the isolation structure is enclosed to form a plurality of first openings; forming a light emitting device on one side of the substrate, and forming a filling layer on one side of the isolation structure away from the substrate, wherein at least part of the light emitting device is positioned in the corresponding first opening; forming a packaging layer on one side of the light emitting device and the filling layer, which is away from the substrate; Forming a photoetching layer on the packaging layer, and reserving the photoetching layer in a corresponding area through development; Removing the packaging layer outside the corresponding area and forming a part of packaging unit, wherein the packaging unit comprises a shielding part, the shielding part is positioned at one side of the isolation structure, which is away from the substrate, the filling layer is in contact with the isolation structure and is arranged at intervals with the shielding part, and the orthographic projection of the filling layer on the substrate is positioned in the orthographic projection of the packaging unit on the substrate; removing the light emitting device, the filling layer and the residual lithography layer outside the corresponding region; The above steps are repeated to form the light emitting device, the filling layer, and the encapsulation unit at the positions corresponding to the first openings where the light emitting devices are not formed.
9. The method of manufacturing a display panel according to claim 8, wherein the step of forming a light emitting device at one side of the substrate comprises: forming a light emitting function layer on one side of the substrate; forming a second electrode on one side of the light-emitting functional layer, which is away from the substrate; Preferably, the materials of the light emitting functional layer, the filling layer and the photolithography layer include organic materials; preferably, the material of the photoetching layer comprises photoresist; Preferably, the material of the filling layer is the same as the material of the light emitting functional layer; Preferably, the filling layer and the light-emitting functional layer are formed through the same preparation process.
10. The method of manufacturing a display panel according to claim 9, wherein the step of removing the light emitting device, the filling layer and the remaining photoresist layer outside the corresponding region comprises: removing the second electrode outside the corresponding area and the second electrode between the shielding part and the filling layer based on a wet etching mode, and forming a second gap between the shielding part and the filling layer; removing the light-emitting functional layer, the filling layer and the residual photoetching layer outside the corresponding area based on a dry etching mode, and forming a part of filling part; Preferably, the luminescent functional layer, the filling layer and the residual photoetching layer outside the corresponding area are removed based on an oxygen dry etching mode; Preferably, the light-emitting functional layer, the filling layer and the residual photoetching layer outside the corresponding area are removed based on a mode of combining oxygen dry etching and ashing; Preferably, the step of removing the light emitting device, the filling layer and the remaining photoresist layer outside the corresponding region further includes removing a byproduct of the oxygen dry etching by means of pure water cleaning.
11. The method of manufacturing a display panel according to claim 10, wherein the above steps are repeated to form the light emitting device, the filling layer, and the encapsulation unit at positions corresponding to the first openings where the light emitting device is not formed, in the step of: the materials of the luminous functional layers formed in two adjacent circulation processes are at least partially different; preferably, in the same cycle process, the material of the filling part is the same as the material of the light emitting functional layer.
12. The method of manufacturing a display panel according to claim 8, wherein the step of removing the encapsulation layer outside the corresponding region and forming a partial encapsulation unit comprises: Removing the packaging layer outside the corresponding area based on a dry etching mode, and forming a packaging unit which covers the light emitting device and extends to one side of the isolation structure away from the substrate in the corresponding area; preferably, after removing the encapsulation layer outside the corresponding area based on a dry etching manner, removing part of the photoetching layer through an ashing process; Preferably, the encapsulation layer is dry etched based on carbon tetrafluoride gas.
13. The method of manufacturing a display panel according to claim 8, further comprising: a pixel defining layer is formed on one side of the substrate, and a plurality of second openings are formed in the pixel defining layer after the first openings are formed, the second openings being in communication with the corresponding first openings.
14. The method of manufacturing a display panel according to claim 8, wherein the step of forming an isolation functional film layer on one side of the substrate comprises: forming a first functional layer on one side of the pixel defining layer away from the substrate; Forming a second functional layer on one side of the first functional layer away from the substrate; the step of patterning the isolation functional film layer comprises the following steps: Patterning the first functional layer and the second functional layer through an etching process, and forming a separation part and a crown part respectively, wherein the separation part and the crown part jointly enclose to form the first opening.
15. A display device comprising a display panel as claimed in any one of claims 1-7.

Description

Display panel, preparation method and display device Technical Field The invention relates to the technical field of display, in particular to a display panel, a preparation method and a display device. Background An Organic Light-Emitting Diode (OLED) is an Organic thin film electroluminescent device, which has the advantages of low power consumption, high brightness, wide viewing angle, high contrast ratio, and flexible display, and has been widely used in electronic display products. However, current electronic display products are limited to designs of their own structures, whose performance is to be further improved. Disclosure of Invention The invention aims to provide a display panel, a preparation method and a display device, so as to solve the problems. In order to achieve the above purpose, the application adopts the following technical scheme: A display panel includes a substrate, an isolation structure, a plurality of light emitting devices, a filling layer, and an encapsulation layer. The isolation structure is positioned on the substrate and surrounds the substrate to form a plurality of first openings. The light emitting device is positioned on the substrate, and at least part of the light emitting device is exposed from the first opening. The packaging layer is located the light emitting device deviates from one side of base plate, the packaging layer includes a plurality of encapsulation units, encapsulation unit with light emitting device one-to-one sets up, encapsulation unit covers light emitting device and extends to isolation structure deviates from one side of base plate, encapsulation unit includes shielding part, shielding part is located isolation structure deviates from one side of base plate, shielding part with isolation structure interval sets up. The filling layer is located the isolation structure deviates from one side of base plate, the filling layer with isolation structure contact sets up and with shielding part interval sets up, the filling layer is in the orthographic projection of base plate is located the encapsulation unit is in the orthographic projection of base plate. Further, the light emitting device includes a first electrode, a light emitting functional layer, and a second electrode. The first electrode is arranged on one side of the substrate. The light-emitting functional layer is arranged on one side of the first electrode, which is away from the substrate. The second electrode is arranged on one side of the light-emitting functional layer, which is away from the substrate, and is overlapped with the isolation structure. Preferably, the material of the filling layer is the same as the material of the light emitting functional layer. Preferably, the filling layer and the light-emitting functional layer are arranged on the same layer. Further, the package unit further includes a body portion extending from a surface of the light emitting device facing away from the substrate to cover a sidewall of the first opening and connected to the shielding portion. Preferably, a first gap is provided between two adjacent packaging units. Preferably, the filling layer includes a plurality of filling portions, the filling portions are disposed around the corresponding light emitting devices, and the first gap is located between two adjacent filling portions. Further, the light emitting device comprises a first light emitting device, a second light emitting device and a third light emitting device which emit light rays with different colors, and materials of the light emitting functional layers in the first light emitting device, the second light emitting device and the third light emitting device are at least partially different. Preferably, the filling portion includes a first filling portion, a second filling portion, and a third filling portion. The first filling part is arranged around the first light-emitting device, and the material of the first filling part is the same as that of the light-emitting functional layer in the first light-emitting device. The second filling part is arranged around the second light-emitting device, and the material of the second filling part is the same as that of the light-emitting functional layer in the second light-emitting device. The third filling part is arranged around the third light-emitting device, and the material of the third filling part is the same as that of the light-emitting functional layer in the third light-emitting device. Further, the display panel further includes a pixel defining layer, where the pixel defining layer is disposed on one side of the substrate and encloses a plurality of second openings formed therein, and the second openings are communicated with the corresponding first openings. A portion of the first electrode is located between the pixel defining layer and the substrate, and another portion is exposed from the corresponding second opening. Preferably, the orthographic projection of the filler la