To provide a display device that is suitable for increasing in size, a display device in which display unevenness is suppressed, or a display device that can display an image along a curved surface. The display device includes a first display panel and a second display panel each including a pair of substrates. The first display panel and the second display panel each include a first region which can transmit visible light, a second region which can block visible light, and a third region which can perform display. The third region of the first display panel and the first region of the second display panel overlap each other. The third region of the first display panel and the second region of the second display panel do not overlap each other.

An electrical connection structure (100) of a lamp cap, comprising a substrate (20), a plastic piece (30) and a lamp cap (60), wherein the lamp cap (60) comprises a first electrode (61) and a second electrode (62). The first electrode (61) is insulated from the second electrode (62) and the second electrode (62) is fixed relative to the first electrode (61). The plastic piece (30) is arranged above the first electrode (61). An electronic element, and a first connection end (21) and a second connection end (22) which are electrically connected to the electronic element, are provided on the substrate (20). The first electrode (61) is electrically connected to the first connection end (21). The second electrode (62) is of a rod-shaped structure.