Patent ID: 7679922

Claim:
A display device, comprising: a display element having a display function; and a functional element having a function different from that of the display element, wherein: the functional element is laminated on the display element so as to be confined in a planar area of the display element, and the display element includes a thin film substrate provided with a circuit element of a display section, the thin film substrate having provided directly thereon an arithmetic processing device and having provided directly thereon a plurality of transistors arranged in an array to drive corresponding pixels of the display element, and the functional element and the thin film substrate are connected by using (i) a first flexible printed circuit board, enabling external connection, a first end of which is connected to the display element, and (ii) a second flexible printed circuit board, a first end of which is connected to the functional element and a second end of which is connected to a middle portion of the first printed circuit board.