Hello,thank you for your answer.I search the screen a little bit and i found out these infos:operating mode:AH-IPS panel type:a-Si TFT-LCD , LCM .I found those info here http://www.panelook.com/LP173WF4-SPF3_LG%20Display_17.3_LCM_overview_27611.html .So,is it an IPS or a TFT-LCD??