100Hz is the refresh rate. The general frame refresh rate of old CRT's was 50Hz. hence you you would see the screen flickering.
Later gen CRT TV's upped the refresh rate to 100Hz. Example was the Sony Wega DRC series.
LCD's came with 50Hz initially. Only now sharp/Panasonic have the 100Hz model available.
Sony's D series inserts frames when needed based on what your viewing. It's like a software processing. It's not a default 100Hz TV. The panasonic is always 100Hz.
we discussed this earlier as well.
https://www.team-bhp.com/forum/gadge...lcd-tv-38.html