Foldable display and portable electronic device

A portable electronic device, comprising:

• a host;
• a first rotating shaft;
• a foldable display, wherein the first rotating shaft is connected between the host and the foldable display, the foldable display rotates through the first rotating shaft relative to the host to be unfolded and closed, the first rotating shaft has a first gear, and the foldable display comprises:
• a first bracket;
• at least one second bracket;
• and
• at least one second rotating shaft, connecting the first bracket and the second bracket, the first bracket and the second bracket relatively rotating through the second rotating shaft to be unfolded and closed, and the second rotating shaft having a second gear engaged with the first gear,
• wherein when the host and the foldable display relatively rotate through the first rotating shaft to be unfolded and closed, the first rotating shaft drives the second rotating shaft via the first gear and the second gear, so that the second bracket rotates relative to the first bracket to be unfolded and closed.