Abstract: An expanding structure for a cylinder internal unit and a cylinder internal unit are provided. The expanding structure includes a first expanding structure arranged at an end of an internal unit and a second expanding structure arranged on a side wall of the internal unit. The first expanding structure includes a plurality of first expanding assemblies arranged at intervals in a circumferential direction of the base. The second expanding structure includes a plurality of second expanding assemblies arranged at intervals in a circumferential direction of the internal unit. With coordination of the first expanding structure and the second expanding structure, strength required for expanding can be achieved, and uniform expansion of the end and the side wall of the internal unit can be achieved in the expanding process. The expanding structure is easy to be assembled and disassembled, the operation is simple, and operation efficiency is effectively improved.

Abstract: The present disclosure relates to a display panel and a display device. In the display panel, multiple transfer lines are arranged in a layer different from a layer in which first signal lines are located, and the transfer lines are connected to parts of the first signal lines close to bending sections through transfer holes. Multiple transfer holes are close to an edge of a non-display area along a first direction in sequence and are away from the edge of the non-display area along a second direction in sequence.

Abstract: A substrate includes a base, a pixel defining layer, a plurality of electrode pairs, and a plurality of light-emitting devices. The pixel defining layer is disposed on the base, and includes a plurality of through holes. At least one electrode pair includes a first electrode and a second electrode that are disposed at least on a hole wall of one of the through holes and at least partially opposite to each other, and the first electrode and the second electrode are insulated from each other. One of the plurality of light-emitting devices includes a liquid functional layer disposed in the through hole. The liquid functional layer is in direct contact with the first electrode and the second electrode. The liquid functional layer includes a liquid light-emitting layer configured to emit light.

Abstract: The present disclosure provides an organic thin film and a method for preparing the same, a display device, and an optical device, in which the method includes: providing a base substrate; forming an isomerization generating layer on the base substrate, the isomerization generating layer including a first region and a second region; adding a precursor solution on a surface of the isomerization generating layer away from the base substrate, and allowing surface energy of the second region to be greater than surface energy of the first region, so as to form the organic thin film from the precursor solution, the precursor solution being at least partially located in the second region.

Abstract: The present disclosure provides an organic thin film and a method for preparing the same, a display device, and an optical device, in which the method includes: providing a base substrate; forming an isomerization generating layer on the base substrate, the isomerization generating layer including a first region and a second region; adding a precursor solution on a surface of the isomerization generating layer away from the base substrate, and allowing surface energy of the second region to be greater than surface energy of the first region, so as to form the organic thin film from the precursor solution, the precursor solution being at least partially located in the second region.

Abstract: A substrate includes a base, a pixel defining layer, a plurality of electrode pairs, and a plurality of light-emitting devices. The pixel defining layer is disposed on the base, and includes a plurality of through holes. At least one electrode pair includes a first electrode and a second electrode that are disposed at least on a hole wall of one of the through holes and at least partially opposite to each other, and the first electrode and the second electrode are insulated from each other. One of the plurality of light-emitting devices includes a liquid functional layer disposed in the through hole. The liquid functional layer is in direct contact with the first electrode and the second electrode. The liquid functional layer includes a liquid light-emitting layer configured to emit light.