CN-122003035-A - Display panel, preparation method of display panel and display device

CN122003035ACN 122003035 ACN122003035 ACN 122003035ACN-122003035-A

Abstract

The disclosure relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device. The display panel comprises a substrate, a touch electrode, a pixel definition layer, a plurality of separation structures, a first electrode layer and a second electrode layer, wherein the touch electrode is positioned on one side of the substrate, the pixel definition layer covers one side of the touch electrode, which is away from the substrate, to define a plurality of pixel openings, the separation structures are positioned on one side of the pixel definition layer, which is away from the substrate, at least two separation structures are arranged between every two adjacent pixel openings, an isolation area positioned between the adjacent pixel openings is formed between the adjacent separation structures, orthographic projection of the isolation area on the substrate overlaps orthographic projection of the touch electrode on the substrate, the luminous layer fills at least part of space of the pixel openings, and the first electrode layer is positioned on one side of the luminous layer, which is away from the substrate, and is disconnected at least in the isolation area. The touch electrode shielding structure can prevent the first electrode layer from shielding the touch electrode on one side deviating from the substrate, weaken the influence of parasitic capacitance on the touch electrode, and effectively improve the detection precision of the touch electrode.

Inventors

LI DONGSHENG

Assignees

北京维信诺科技有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (16)

1. A display panel, comprising: a substrate; The touch electrode is positioned on one side of the substrate; The pixel definition layer covers one side of the touch electrode, which is away from the substrate, and defines a plurality of pixel openings; The separation structures are positioned on one side of the pixel definition layer, which is away from the substrate, at least two separation structures are arranged between every two adjacent pixel openings, an isolation area positioned between the adjacent pixel openings is formed between the adjacent separation structures, and the orthographic projection of the isolation area on the substrate overlaps with the orthographic projection of the touch electrode on the substrate; a light emitting layer filling at least part of the space of the pixel opening; and the first electrode layer is positioned on one side of the light-emitting layer, which is away from the substrate, and is disconnected at least in the isolation region.
2. The display panel according to claim 1, wherein the partition structure includes a first film layer and a second film layer stacked in this order in a direction away from the pixel defining layer, and an orthographic projection of the first film layer on the substrate falls within an orthographic projection range of the second film layer on the substrate; preferably, the first film layer includes an organic film layer, an inorganic film layer, or a metal film layer; preferably, the first film layer includes a black organic film layer; preferably, the second film layer includes an organic film layer, an inorganic film layer, or a metal film layer; Preferably, the second film layer comprises an inorganic film layer; Preferably, the separation structure further comprises a third film layer disposed on one side of the first film layer near the pixel definition layer, wherein the orthographic projection of the first film layer on the substrate is located in the orthographic projection range of the third film layer on the substrate, and the orthographic projection of the third film layer on the substrate is located in the orthographic projection range of the second film layer on the substrate; preferably, the third film layer includes a metal conductive film layer.
3. The display panel according to claim 1 or 2, wherein the orthographic projection of the isolation region on the substrate covers the orthographic projection of the touch electrode on the substrate.
4. A display panel according to claim 1 or 2, wherein the separation structure encloses a separation opening, the orthographic projection of the pixel opening on the substrate being located within the orthographic projection range of the separation opening on the substrate, a part of the light emitting layer being located within the separation opening, the light emitting layer comprising sub light emitting layers of different colors, the sub light emitting layers of different colors being disconnected at least at the separation region; Preferably, the light emitting layer covers at least part of the surface of the side of the separation structure facing away from the substrate; preferably, the first electrode layer is electrically connected with the partition structure; preferably, the first electrode layer portion extends to a side wall of the separation structure adjacent to the light emitting layer and is electrically connected to the separation structure.
5. The display panel according to claim 1 or 2, further comprising: The second electrode layer is positioned on one side of the light-emitting layer, which is close to the substrate, and the touch electrode is arranged on the second electrode layer; preferably, the second electrode layer includes a plurality of sub-electrodes arranged at intervals, and the touch electrode is located between adjacent sub-electrodes; Preferably, the orthographic projection of the sub-electrode on the substrate covers the orthographic projection of the pixel opening on the substrate; preferably, the light-emitting device further comprises a first packaging layer, wherein the first packaging layer comprises a first packaging part positioned on one side of the light-emitting layer, which is away from the substrate, and a second packaging part positioned on one side of the separation structure, which is away from the substrate; Preferably, the orthographic projection of the second packaging part on the substrate is positioned in the orthographic projection range of the separation structure on the substrate; Preferably, a hollowed-out gap is formed between a side surface of the second packaging part facing the substrate and a side surface of the separation structure facing away from the substrate; preferably, the first packaging layer further comprises a third packaging part located in the isolation region, and at least part of the third packaging part covers the side wall, close to the isolation region, of the separation structure; Preferably, the packaging structure further comprises a second packaging layer, wherein the second packaging layer is located on one side, away from the substrate, of the first packaging layer, and fills the hollowed-out gap and the isolation region.
6. A display panel, comprising: a substrate; The second electrode layer is positioned on one side of the substrate and comprises sub-electrodes and touch electrodes which are arranged at intervals in an insulating manner; The pixel definition layer is positioned on one side of the second electrode layer, which is away from the substrate, and the pixel definition layer is enclosed to form a pixel opening, and the adjacent pixel openings are arranged at intervals; The light-emitting unit is positioned on one side of the sub-electrode, which is away from the substrate, and at least part of the light-emitting unit is positioned in the pixel opening; The first electrode layer is positioned on one side of the light-emitting layer, which is away from the substrate, and the orthographic projection of the first electrode layer on the substrate is not overlapped with the orthographic projection of the touch electrode on the substrate.
7. The display panel of claim 6, further comprising: The separation structure is positioned on one side of the pixel definition layer, away from the substrate, and between the adjacent pixel openings, the separation structure separates the positions between the pixel openings to form an isolation region, the substrate points to the light emitting unit, the touch electrode is correspondingly arranged with the isolation region, and the first electrode layer is disconnected in the isolation region.
8. The display panel according to claim 7, wherein the number of the partition structures is plural, the plural partition structures are in one-to-one correspondence with the plural pixel openings, and the partition structures are disposed around the outside of the pixel openings.
9. The display panel according to claim 8, wherein the partition structure is electrically connected to the first electrode layer, or the partition structure is provided with a through hole in which a conductive portion is penetrated, the conductive portion being electrically connected to the first electrode layer.
10. The display panel according to claim 7, wherein the partition structure includes a plurality of partition portions each surrounding an outside of the pixel opening and arranged at intervals, and a connection portion electrically connected to the first electrode layer is connected between adjacent partition structures surrounding an outside of the same pixel opening.
11. A display panel as claimed in any one of claims 7 to 10, characterized in that the separation structure comprises at least two film layers arranged one above the other in a direction away from the pixel defining layer, the front projection of one film layer onto the substrate lying within the front projection of the other film layer onto the substrate on the side away from the substrate.
12. A method for manufacturing a display panel, comprising: Providing a substrate; Preparing a touch electrode on one side of the substrate; Preparing a pixel definition layer on one side of the substrate, wherein the pixel definition layer covers one side of the touch electrode, which is away from the substrate, and the pixel definition layer defines a plurality of pixel openings; Preparing a plurality of separation structures on one side of the pixel definition layer, which is away from the substrate, wherein at least two separation structures are prepared between every two adjacent pixel openings, and an isolation area is formed between at least two adjacent separation structures between every two adjacent pixel openings, and the orthographic projection of the isolation area on the substrate overlaps with the orthographic projection of the touch electrode on the substrate; preparing a light emitting layer filling at least part of the space of the pixel opening; And preparing a first electrode layer on one side of the light-emitting layer, which is away from the substrate, wherein the first electrode layer is disconnected at least in the isolation region.
13. The method of manufacturing according to claim 12, wherein the pixel opening includes a first pixel opening, a second pixel opening, and a third pixel opening, the preparing a light emitting layer and the preparing a first electrode layer on a side of the light emitting layer facing away from the substrate includes: Preparing a first sub-luminescent layer, wherein the first sub-luminescent layer fills the pixel opening, and covers one side of the pixel definition layer, which is away from the substrate, and one side of the separation structure, which is away from the substrate; preparing a first sub-cathode layer, wherein the first sub-cathode layer covers the surface of the first sub-light-emitting layer far away from the substrate; preparing a first sub-packaging layer, wherein the first sub-packaging layer is positioned on one side of the first sub-cathode layer far away from the substrate; Performing first patterning treatment to remove the first sub-luminescent layer, the first sub-cathode layer and the first sub-packaging layer which are positioned at the second pixel opening, the third pixel opening and the isolation region; Preferably, the preparing a light emitting layer and the preparing a first electrode layer on a side of the light emitting layer facing away from the substrate further includes: Preparing a second sub-luminescent layer, wherein the second sub-luminescent layer fills the second pixel opening and the third pixel opening, and the second sub-luminescent layer covers the first sub-cathode layer, one side of the pixel definition layer, which is away from the substrate, and one side of the separation structure, which is away from the substrate; Preparing a second sub-cathode layer, wherein the second sub-cathode layer covers the surface of the second sub-luminescent layer far away from the substrate; preparing a second sub-packaging layer, wherein the second sub-packaging layer is positioned on one side of the second sub-cathode layer far away from the substrate; Performing second patterning treatment to remove the second sub-luminescent layer, the second sub-cathode layer and the second sub-packaging layer which are positioned on the surface of the first sub-packaging layer, the third pixel opening and the isolation region; Preferably, the preparing a light emitting layer and the preparing a first electrode layer on a side of the light emitting layer facing away from the substrate further includes: preparing a third sub-luminescent layer, wherein the third sub-luminescent layer fills the third pixel opening, and the third sub-luminescent layer covers the first sub-cathode layer, the second sub-cathode layer, one side of the pixel definition layer, which is away from the substrate, and one side of the separation structure, which is away from the substrate; preparing a third sub-cathode layer, wherein the third sub-cathode layer covers the surface of the third sub-luminescent layer far away from the substrate; preparing a third sub-packaging layer, wherein the third sub-packaging layer is positioned on one side of the third sub-cathode layer far away from the substrate; And performing third patterning treatment to remove the third sub-luminescent layer, the third sub-cathode layer and the third sub-packaging layer which are positioned on the surfaces of the first sub-packaging layer, the second sub-packaging layer and the isolation region.
14. The method of manufacturing according to claim 12 or 13, wherein before forming the pixel defining layer on one side of the substrate, further comprising: and preparing a second electrode layer, wherein the second electrode layer is positioned on one side of the substrate and is positioned on one side of the light-emitting layer, which is close to the substrate.
15. The method of manufacturing according to claim 13, further comprising: And preparing a second packaging layer, wherein the second packaging layer is positioned on one side of the first sub-packaging layer, the second sub-packaging layer, the third sub-packaging layer and the separation structure, which is away from the substrate.
16. A display device comprising the display panel of any one of claims 1 to 5, or the display panel of any one of claims 6 to 11, or the display panel prepared by the method of any one of claims 12 to 15.

Description

Display panel, preparation method of display panel and display device Technical Field The invention relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device. Background Touch technologies currently in wide use mainly cover two categories, i.e., plug-in touch technologies and embedded touch technologies. The external Touch technology realizes a Touch function by directly attaching a Touch Panel (TP) film to the surface of a display screen. The film layer is relatively thick, and the overall integration level is low due to structural independence. The In-cell Touch technology is further subdivided into two technologies, touch-on-package (TOE) and In-cell Touch (Incell). The TOE technology significantly reduces the thickness of the whole screen by manufacturing the touch control functional layer on the packaging layer, however, this scheme requires a low-temperature process, which may limit the optical viewing angle of the display and have a certain influence on the integration of other functional modules. The built-in touch technology is used as a more ideal touch solution, and the touch sensor is directly integrated in the pixel layer of the display screen, so that higher integration level and thinner screen design are realized. Therefore, in-built touch technology among in-cell touch technologies is currently used. However, in the built-in touch technology, the parasitic capacitance is large, which affects the detection accuracy of the touch electrode. Disclosure of Invention In view of the above, the embodiments of the present disclosure provide a display panel, a manufacturing method of the display panel, and a display device, which solve the problem of poor detection accuracy of embedded touch electrodes in the related art. The disclosure provides a display panel, which comprises a substrate, a touch electrode, a pixel definition layer, a plurality of separation structures, a first electrode layer and a second electrode layer, wherein the touch electrode is positioned on one side of the substrate, the pixel definition layer covers one side of the touch electrode, which is away from the substrate, the pixel definition layer defines a plurality of pixel openings, the separation structures are positioned on one side of the pixel definition layer, which is away from the substrate, at least two separation structures are arranged between every two adjacent pixel openings, an isolation area is formed between every two adjacent separation structures, the orthographic projection of the isolation area on the substrate overlaps with the orthographic projection of the touch electrode on the substrate, the light-emitting layer fills at least part of the space of the pixel openings, the first electrode layer is positioned on one side of the light-emitting layer, which is away from the substrate, and the first electrode layer is disconnected at least in the isolation area. According to one embodiment of the disclosure, the separation structure comprises a first film layer and a second film layer which are sequentially stacked along a direction away from the pixel definition layer, wherein the orthographic projection of the first film layer on the substrate falls in the orthographic projection range of the second film layer on the substrate, preferably the first film layer comprises an organic film layer, an inorganic film layer or a metal film layer, preferably the first film layer comprises a black organic film layer, preferably the second film layer comprises an organic film layer, an inorganic film layer or a metal film layer, preferably the second film layer comprises an inorganic film layer, preferably the separation structure further comprises a third film layer arranged on one side of the first film layer close to the pixel definition layer, the orthographic projection of the first film layer on the substrate is located in the orthographic projection range of the third film layer on the substrate, the orthographic projection of the third film layer on the substrate is located in the orthographic projection range of the second film layer on the substrate, and preferably the third film layer comprises a third conductive film layer. According to one embodiment of the disclosure, the orthographic projection of the isolation region on the substrate covers the orthographic projection of the touch electrode on the substrate. According to one embodiment of the disclosure, the separation structure encloses to form an isolation opening, the orthographic projection of the pixel opening on the substrate is located in the orthographic projection range of the isolation opening on the substrate, a part of the light-emitting layer is located in the isolation opening, the light-emitting layer comprises sub-light-emitting layers with different colors, the sub-light-emitting layers with different colors are disconnected at least in the isolation reg