US Patent 11452218 Rollable display device

A display device includes a display module and a housing. At least one roller is disposed in the housing. The display module is configured to be wound on the at least one roller and to be inserted and drawn from the housing. The display module comprises a display panel, a window on the display panel and an adhesion layer between the display panel and the window. The adhesion layer comprises a first polymer layer having positive charges and a second polymer layer having negative charges. The second polymer layer is directly disposed on the first polymer layer.