Display panel, display device, and preparation method

A display device, comprising a display panel, wherein the display panel comprises:

• a base substrate;
• electrode units disposed on a side of the base substrate, wherein the electrode units comprise a main electrode unit and redundant electrode units;
• a first light-emitting unit electrically connected to the main electrode unit;
• bank structures;
• openings disposed among the bank structures, and
• functional structures,
• wherein the openings comprise first openings, and
• wherein for a first opening of the first openings, a redundant electrode unit of the redundant electrode units is disposed in the first opening;
• and
• wherein for a first opening of a part of the first openings, the first opening is filled with a functional structure of the functional structures, and the functional structure is at least partially disposed on a side of the redundant electrode unit facing away from the base substrate;
• wherein at least two bank structures of the bank structures are provided between adjacent redundant electrode units of the redundant electrode units, a third opening is provided between adjacent bank structures of the bank structures, and the third opening is filled with a part of the functional structures;
• or
• the display panel further comprises:
• a second encapsulation structure, and at least one of a fourth opening or a fifth opening:
• wherein the second encapsulation structure is at least partially disposed on a side of the first light-emitting unit facing away from the base substrate, and an orthographic projection of the second encapsulation structure on the base substrate covers an orthographic projection of the first light-emitting unit on the base substrate;
• for the fourth opening, at least one sidewall of the fourth opening is a sidewall of the second encapsulation structure, and the fourth opening is filled with a part of the functional structures;
• for the fifth opening, at least one sidewall of the fifth opening is a sidewall of the second encapsulation structure, and at least one sidewall of the fifth opening is a side wall of a bank structure of the bank structures, a part of the redundant electrode units is disposed in the fifth opening, the fifth opening is filled with a part of the functional structures, and the part of the functional structures is at least partially disposed on a side of the part of the redundant electrode units facing away from the base substrate;
• or
• wherein the functional structures comprise a light-shielding material.

A preparation method of a display panel, comprising:

• providing a base substrate;
• forming electrode units on a side of the base substrate, wherein the electrode units comprise a main electrode unit and redundant electrode units;
• electrically connecting a first light element unit to the main electrode unit;
• forming, on the base substrate, bank structures and openings disposed among the bank structures, wherein the openings comprise first openings, and wherein for a first opening of the first openings, a redundant electrode unit of the redundant electrode units is disposed in the first opening, wherein at least two bank structures of the bank structures are provided between adjacent redundant electrode units of the redundant electrode units;
• and
• forming functional structures, wherein for a first opening of a part of the first openings is filled with a functional structure of the functional structures, and the functional structure is at least partially disposed on a side of the redundant electrode unit facing away from the base substrate;
• forming a third opening between adjacent bank structures of the bank structures, filling the third opening with a part of the functional structures;
• or
• wherein after electrically connecting the first light-emitting unit to the main electrode unit, the method further comprises:
• forming a second encapsulation structure, and at least one of a fourth opening or a fifth opening;
• wherein the second encapsulation structure is at least partially disposed on a side of the first light-emitting unit facing away from the base substrate, and an orthographic projection of the second encapsulation structure on the base substrate covers an orthographic projection of the first light-emitting unit on the base substrate;
• for the fourth opening, at least one sidewall of the fourth opening is a sidewall of the second encapsulation structure, and the fourth opening is filled with a part of the functional structures;
• for the fifth opening, at least one sidewall of the fifth opening is a sidewall of the second encapsulation structure, and at least one sidewall of the fifth opening is a side wall of a bank structure of the bank structures, a part of the redundant electrode units is disposed in the fifth opening, the fifth opening is filled with a part of the functional structures, and the part of the functional structures is at least partially disposed on a side of the part of the redundant electrode units facing away from the base substrate;
• or
• wherein the functional structures comprise a light-shielding material.