Display panel

Patent metadata

Field	Value
Publication number	US-11522035-B2
Application number	US-202016929830-A
Country	US
Kind code	B2
Filing date	Jul 15, 2020
Priority date	Oct 31, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A display panel includes a base layer, a circuit layer, a light emitting element, a pixel defining film, an encapsulation layer, and a first dam. The base layer may include a display area and a non-display area adjacent to the display area. The encapsulation layer may include a first inorganic film, an organic film, and a second inorganic film. The first dam may be disposed between the first inorganic film and the second inorganic film, and outside the organic film. The first dam may overlap the non-display area and the pixel defining film on a plane. Therefore, in the display panel of an embodiment, the non-display area may be reduced.

First claim

What is claimed is:

1. A display panel comprising:
a base layer on which a display area and a non-display area adjacent to the display area are defined;
a circuit layer on the base layer and comprising: a pixel circuit layer overlapping the display area and a driving circuit layer overlapping the non-display area and having a power electrode and a driving signal line;
a light emitting element on the pixel circuit layer and comprising a pixel electrode electrically connected to the pixel circuit layer, an emission layer on the pixel electrode, and a common electrode on the emission layer and extending from the display area toward the non-display area;
a pixel defining film on the pixel electrode and exposing at least a portion of the pixel electrode;
an encapsulation layer on the light emitting element and comprising a first inorganic film, an organic film on the first inorganic film, and a second inorganic film on the organic film; and
a first dam between the first inorganic film and the second inorganic film, outside the organic film, and overlapping the non-display area and the pixel defining film on a plane, the first dam being in direct contact with the first inorganic film and the second inorganic film.

2. A display panel comprising:
a base layer on which a display area and a non-display area adjacent to the display area are defined;
a circuit layer on the base layer and comprising: a pixel circuit layer overlapping the display area and a driving circuit layer overlapping the non-display area and having a power electrode and a driving signal line;
a light emitting element on the pixel circuit layer and comprising a pixel electrode electrically connected to the pixel circuit layer, an emission layer on the pixel electrode, and a common electrode on the emission layer and extending from the display area toward the non-display area;
a pixel defining film on the pixel electrode and exposing at least a portion of the pixel electrode;
an encapsulation layer on the light emitting element and comprising a first inorganic film, an organic film on the first inorganic film, and a second inorganic film on the organic film;
a first dam between the first inorganic film and the second inorganic film, outside the organic film, and overlapping the non-display area and the pixel defining film on a plane; and
a connection electrode that electrically connects the power electrode and the common electrode, and in which an electrode hole is defined,
wherein the first dam overlaps the electrode hole.

3. The display panel of claim 2 , further comprising a second dam spaced apart from the first dam, between the first inorganic film and the second inorganic film, and outside the organic film.

4. The display panel of claim 3 , wherein a plurality of electrode holes are defined in the connection electrode, and
the second dam overlaps at least a portion of the plurality of electrode holes.

5. The display panel of claim 3 , wherein the second dam does not overlap the pixel defining film on a plane and overlaps at least a portion of the power electrode on a plane.

6. The display panel of claim 2 , wherein the pixel defining film fills the electrode hole.

7. The display panel of claim 2 , wherein the connection electrode is on the same layer as the pixel electrode.

8. The display panel of claim 1 , wherein the first dam comprises a polymer resin, and
the polymer resin comprises a hydrophobic group having a fluoro group and/or a silyl group.

9. The display panel of claim 8 , wherein the polymer resin comprises a first repeating unit represented by Formula 1:

wherein in Formula 1,
R 1 to R 3 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms,
m 1 is an integer of 0 to 5, and
n 1 is an integer of 1 to 100.

10. The display panel of claim 9 , wherein the first repeating unit is about 0.1 wt % to about 10 wt % with respect to the total mass of the polymer resin.

11. The display panel of claim 9 , wherein the polymer resin further comprises at least one of an acrylic repeating unit, an imide repeating unit, an olefin repeating unit, a phenol repeating unit, a siloxane repeating unit, a polyol repeating unit, an ether repeating unit, or a thiol repeating unit, and
the repeating units each independently comprise a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms.

12. The display panel of claim 11 , wherein the acrylic repeating unit is represented by Formula 2-1, the imide repeating unit is represented by Formula 2-2, and the olefin repeat unit is represented by Formula 2-3:

wherein in Formulae 2-1 to 2-3,
R 4 to R 11 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms,
m 2 is an integer of 0 to 5, and
n 2 to n 4 are each independently an integer of 1 to 100.

13. The display panel of claim 8 , wherein the first inorganic film comprises at least one of silicon oxide, silicon nitride, or silicon nitride oxide, and
the organic film comprises an organic polymer having a hydrophilic repeating unit.

14. A display panel comprising:
a base layer on which a display area and a non-display area adjacent to the display area are defined;
a circuit layer on the base layer;
a light emitting element on the circuit layer;
an encapsulation layer on the light emitting element and comprising a first inorganic film, an organic film on the first inorganic film, and a second inorganic film on the organic film; and
a first dam directly between the first inorganic film and the second inorganic film, overlapping the non-display area, and comprising a polymer resin having a first repeating unit represented by Formula 1:

wherein in Formula 1,
R 1 to R 3 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms,
m 1 is an integer of 0 to 5, and
n 1 is an integer of 1 to 100.

15. The display panel of claim 14 , wherein the polymer resin further comprises at least one of an acrylic repeating unit, an imide repeating unit, an olefin repeating unit, a phenol repeating unit, a siloxane repeating unit, a polyol repeating unit, an ether repeating unit, or a thiol repeating unit, and
the repeating units each independently comprise a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms.

16. The display panel of claim 14 , wherein the circuit layer comprises a pixel circuit layer overlapping the display area and a driving circuit layer overlapping the non-display area,
the driving circuit layer comprising a power electrode and providing a driving signal to the pixel circuit layer,
wherein the light emitting element is on the pixel circuit layer, and comprises a pixel electrode, an emission layer on the pixel electrode, and a common electrode on the emission layer and exte

Assignees

• Samsung Display Co Ltd

Inventors

• Ha Jaeheung
• Kim Yisu
• Ju Yongchan
• Kang Suk Hoon
• Kim Wonjong
• Kim Jongwoo

Classifications

• H01L2251/303

  Electricity · mapped topic

• H01L27/3276 Primary

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H10K59/805

  Electrodes · CPC title