Display panel and display device

A display panel, comprising:

• a substrate;
• an isolation structure disposed on a side of the substrate and enclosing and forming a plurality of isolation openings;
• a plurality of light-emitting units disposed on a side of the substrate facing the isolation structure;
• and
• an encapsulation layer comprising a first encapsulation portion, wherein the first encapsulation portion is located on a side of at least one of the plurality of light-emitting units facing away from the substrate and covers a surface of the isolation structure facing an isolation opening of the plurality of isolation openings;
• and
• within a cross section parallel to a thickness direction of the display panel and passing through a central axis of the isolation opening corresponding to the first encapsulation portion, a first sidewall of the first encapsulation portion comprises point A and point B;
• wherein a distance from the point A to a plane on which the substrate is located is Ha, a distance from the point A to the central axis of the isolation opening corresponding to the first encapsulation portion is La, a distance from the point B to the plane on which the substrate is located is Hb, and a distance from the point B to the central axis of the isolation opening corresponding to the first encapsulation portion is Lb, wherein Ha≤Hb, and La≥Lb.

A preparation method for a display panel, comprising:

• providing a substrate;
• forming an isolation structure on the substrate, wherein the isolation structure encloses and forms a plurality of isolation openings;
• sequentially depositing a first light-emitting material layer, a first electrode material layer and a first encapsulation material layer;
• adjusting different etching rates to pattern the first encapsulation material layer to form a first encapsulation portion to enable an angle between at least part of a first sidewall of the first encapsulation portion and a plane on which the substrate is located to be each less than or equal to 90°;
• and
• patterning the first electrode material layer and the first light-emitting material layer to form a light-emitting unit to enable the light-emitting unit to be exposed from an isolation opening of the plurality of isolation openings.