Display apparatus and extended reality device

An extended reality device, comprising a display apparatus comprising:

• a first display module, comprising a first substrate, wherein N first signal lines and a multiplexer are arranged on the first substrate;
• a second display module, comprising a second substrate, wherein N second signal lines and a first demultiplexer are arranged on the second substrate;
• and
• a first flexible circuit board, wherein a first connection end of the first flexible circuit board is fixed to the first substrate, the multiplexer is electrically connected between the first connection end of the first flexible circuit board and the first signal lines;
• a second connection end of the first flexible circuit board is fixed to the second substrate, and the first demultiplexer is electrically connected between the second connection end of the first flexible circuit board and the second signal lines,
• wherein a number of electrical connection lines in the first flexible circuit board is M, M is less than N, and both of M and N are positive integers, and
• wherein the display apparatus further comprises at least one of the following:
• a third reinforcing structure, arranged on a side of the first connection end of the first flexible circuit board close to the first substrate, wherein the third reinforcing structure is located in a step region formed by the first flexible circuit board and the first substrate, and is fixed to a surface of the first connection end of the first flexible circuit board close to the first substrate and a sidewall of the first substrate;
• or
• a fourth reinforcing structure, arranged on a side of the second connection end of the first flexible circuit board close to the second substrate, wherein the fourth reinforcing structure is located in a step region formed by the first flexible circuit board and the second substrate, and is fixed to a surface of the second connection end of the first flexible circuit board close to the second substrate and a sidewall of the second substrate.