This paper includes a review about the Screenless Display technology. It describes the system that enables the transmission of video data without using display screen, with (or without) using video source (light source). This system can be divided into 3 types of groups. 1.Visual image, 2.Retinal display, 3.Synaptic interface. This paper illustrates basic working principal of screenless technology, advantages and disadvantages about the technology. It also describes the future application of screenless technology. This is a new emerging technology, still under progress.