An aspect of the invention provides a display with an adjustable focus mechanism. The display with an adjustable focus mechanism includes a display panel for emitting a plurality of rays to form an image a light modulation device for receiving the rays from the display panel and adjusting an emergent angle of each ray and a controller for providing a control signal to drive the light modulation device by estimating the emergent angle of the each of the rays according to an eyesight data of a user and a distance between the user and the display.
