The present disclosure provides a display device including a display panel, a driving circuit, a chip on film and an outer frame, wherein the outer frame includes a bottom frame and a side frame, the driving circuit is located between the display panel and the bottom frame, the display panel includes a TFT array substrate, the TFT array substrate includes a display portion and a bending portion, the display portion is disposed opposite to the bottom frame, the bending portion is disposed opposite to the side frame, and the bending portion is connected to the driving circuit through the chip on film. The TFT array substrate for a display device provided by the present disclosure includes a display portion and a bending portion, the bending portion is connected with the driving circuit through the chip on film, the COF is adhered to the OLB area on the bending portion.