Electronic Devices Having Folding Expandable Displays

The disclosure relates to electronic devices having folding expandable displays. The electronic device has a foldable display. First and second portions of an electronic device housing for the devicemay be joined using hinge structures. A flexible display may overlap the first housing portion, the hinge structures, and the second housing portion. A layer such as a layer of sheet metal may be usedin supporting the display and may overlap the hinge structures. The hinge structures may include gear teeth, belts, and/or other movement synchronization structures. The hinge structures may includemembers that move relative to each other during bending. The moving members may include bars and links with opposing curved bearing surfaces. Stop surfaces may prevent excessive rotation of the bars and links with respect to each other. The links may rotate about pivot points that lie within the thickness of the display without the hinge structure living within the thickness of the display. 本公开涉及具有折叠式可展开显示器的电子设备。电子设备具有可折叠显示