US Patent 11520379 Foldable display device

A foldable display device includes a flexible substrate; a display layer disposed on the flexible substrate; a first display region, a second display region, and a foldable region disposed between the first display region and the second display region; a biometric sensing structure overlapping the flexible substrate from a top view and having a biometric sensing region; and a supporting film disposed under the flexible substrate and including a recess portion in the foldable region. A total area of the biometric sensing region is less than or equal to a total area of the flexible substrate.