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).
The refresh rate is the number of frames per second the television can display. Its unit is a Hertz, which is equal to 1/second. 120Hz means it can draw 120 images per second. The refresh rate of televisions is misleading and is mixed with marketing lies. The increased refresh rate (120Hz and higher) was introduced by manufacturers as an indirect way to reduce the motion blur problem of LCDs and LEDs. However, the response time of 120Hz and 240Hz TVs is usually the same as 60Hz ones. Do not look at the refresh rate of a TV. Not only is the advertised number false, but a 120Hz+ TV does not reduce the amount of motion blur in console games. The response time is the best measure of motion blur in an LED TV. It is the time a pixel takes to transition from one color to another.