Why electronic paper books are so expensive is because of the high cost. Its high cost lies in its display screen, and the display screen cost of an electronic paper book will account for 40%-60% of the total cost.

The display screen of electronic paper book adopts electronic ink display technology, which can only display black and white colors. Its advantages are no harm to eyes and electricity saving, but its disadvantages are high cost and technical difficulty. The current technology can't reduce its cost very well, so the real electronic paper book is more expensive.