Mini DisplayPort is a compact version of the DisplayPort connector introduced by Apple in 2008. Mini DisplayPort is free to license, and in 2009 it was included in the official DisplayPort 1.2 spec. In 2011 Apple and Intel announced the Thunderbolt format, which used the same physical connector, but significantly different protocols.
Screen refresh rate is the number of times an image on any type of monitor or television is reconstructed per second. This is measured in hertz.. (Hz).
120Hz Vs. 240Hz Vs. 60Hz. Refresh rate is important in a television that relies on LCD technology, just because of the way the individual pixels in an LCD light and amount of time it takes to change the light in LCD pixels, as well as the way the LED backlight works behind the LCD screen.