< hardware > (Or "vertical refresh rate", "vertical scan rate") The maximum number of frames that can be displayed on a monitor in a second, expressed in Hertz .
The scan rate is controlled by the vertical sync signal generated by the video controller , ordering the monitor to position the electron gun at the upper left corner of the raster , ready to paint another frame. It is limited by the monitor's maximum horizontal scan rate and the resolution , since higher resolution means more scan lines . Increasing the refresh rate decreases flickering, reducing eye strain, but few people notice any change above 60-72 Hz.
(1999-08-01)