An organic light emitting diode display device having a built-in touch panel is discussed in which pad parts of a touch panel array are connected on a gate in panel circuit unit formed on a lower substrate with an OLED array formed thereon. The RACH preamble is transmitted at a maximum transmit power. 80 and an average surface roughness Ra of from 0. An image transfer bias Ta is applied to the nip during a remaining interval, in which the remaining portion of the recording medium moves away from the nip.