A rollable display device includes a display panel for displaying an image, a printed circuit board connected to an edge of the display panel, and a roller which the display panel is rolled onto or unrolled from. The roller has a cylindrical shape having an inner space, and the printed circuit board is disposed in the inner space.

A rollable display device includes a display panel for displaying an image, a printed circuit board connected to an edge of the display panel, and a roller which the display panel is rolled onto or unrolled from. The roller has a cylindrical shape having an inner space, and the printed circuit board is disposed in the inner space.

A converting machine, or a machine for winding or unwinding a strip of material on coils or for converting coils of a material into smaller coils, is configured to process a delicate material. The machine includes a loading unit for loading a strip of material into the machine, an accumulation unit for accumulating the strip being processed, and a winding unit for winding the strip on a winding shaft to form respective coils, wherein the strip is moved along a path and the units are positioned along the path.

A converting machine, or a machine for winding or unwinding a strip of material on coils or for converting coils of a material into smaller coils, is configured to process a delicate material. The machine includes a loading unit for automatically loading a strip of material into the machine, an accumulation unit for accumulating the strip being processed, and a winding unit for winding the strip on a winding shaft to form respective coils.

An atomization substrate assembly includes: a strip-shaped substrate; and a housing assembly having a housing provided with a housing space for housing the strip-shaped substrate and including a first housing and a second housing, one of the first housing and the second housing being provided with an opening for placing the strip-shaped substrate into the housing space, and an other one of the first housing and the second housing being arranged on the opening in a covering manner.