The present disclosure provides a display device comprising: at least one flexible display panel; and a connective assembly capable of getting the display device into a ring display state where the at least one flexible display panel forms a ring shape, and getting the display device into a flat panel display state where the at least one flexible display panel all has a display surface towards the same direction. The display device can be used as a flat panel display device, e.g., mobile phone, in the flat panel display state, while in the ring display state, the display device can be used as a bracelet. When used as a bracelet, the display device requires no other assistant devices.