Enlarge / TCL's new 6-Series QLED Roku TVs come with mini-LED backlights. (credit: TCL) TCL on Tuesday launched the latest iterations of its popular 6-Series and 5-Series 4K HDR TVs. Both lineups are available starting today, though TCL says the former will have "limited availability" on Tuesday. Prices for the 5-Series start at $400 for a 50-inch model, then move up to $450 for a 55-inch model, $630 for a 65-inch model, or $1,100 for a 75-inch model.