This model is TIENA UD4000(UHD TV)
OpenCell Samsung VA + siliconimage scaler
panel info.
http://www.panelook.com/LSC400FP02_SAMSUNG_40_CELL_parameter_23588.html
scaler chip... maybe Sil9777
it has 4ea HDMI port, all HDMI port available HDMI 2.0 4K(3840x2160) 4:4:4 60HZ...