A plurality of circuit lines SL-M1 and SL-M2 may be respectively connected to the plurality of circuit pads PD-M. A first circuit line SL-M1 may be connected to each of the plurality of first circuit pads PD-M1, and a second circuit line SL-M2 may be connected to the second circuit pad PD-M2. The plurality of circuit pads PD-M may be connected to a signal controller SCP mounted to the main circuit board MPCB by the plurality of circuit lines SL-M1 and SL-M2 (e.g., FIG. 2 shows a connection line between a connection circuit board FPCB at area A and the signal controller SCP).
Referring to FIGS. 7A and 7B in conjunction with FIGS. 4A to 4C, the connection circuit board FPCB and the main circuit board MPCB may be attached to each other by an conductive adhesive member ACF. The input pad PI of the connection circuit board FPCB and the circuit pad PD-M of the main circuit board MPCB may be electrically connected to each other by a conductive element such as a conductive ball CB provided in plural including conductive balls CB distributed on a base resin BR of the conductive adhesive member ACF.
