The Olympus TG-1 has an OLED display which is better than most cameras of a similar type and age to it. Most digital cameras of this type and age have an LCD display. OLED is a newer technology for displays and has much better colour reproduction, faster response times, wider viewing angles and higher brightness compared to LED displays.
This camera's display (OLED) is actually the best display across all digital cameras that have been around for around the same time as the TG-1.
Across comparable types of camera the worst display is LCD.