First plasma display system described by Hungarian engineer Tihanyi in 1936. First practical plasma display invented at University of Illinois in 1964. Panaplex display developed by Burroughs Corporation in early 1970s. IBM introduced first 19-inch plasma display in 1983
16:9 is the international standard for HDTVs and most smartphones. Aspect ratio means 16 units width for every 9 units height. 16:9 screens are 5% smaller than 16:10, saving production costs
Display size, dimensions, and panel type are provided in inches. Panel technologies include 6, 8, and 10-bit RGB components. Common aspect ratios are 4:3, 5:4, 16:9, and 16:10
True Tone adjusts display color and intensity based on ambient light. Feature was first introduced on iPad Pro in 2016. Uses multichannel sensors to measure light around user. Helps reduce eye strain while viewing
PPI measures screen pixel density as pixels per inch. Different from display resolution, which measures pixel count per unit area
AOD keeps smartphone screen on for quick information access. Displays date, time, weather, and app notification icons