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).
When watching TV the picture you see is actually a series of images shown at high speed to create a continuous moving image. Just like a flipbook or film reel. The processing rate â aka the refresh rate â tells you how fast the images are flashing up on the screen.