DVST - Direct-View Storage Tube In Computer Graphics

DVST (Direct-View Storage Tube) is a type of display technology that was used in computer graphics in the mid-twentieth century. It was developed as an improvement over CRT (Cathode Ray Tube) technology, which suffered from image flicker and a limited persistence time.

A DVST consists of a large vacuum tube with a phosphorescent coating on the inside of the screen. Instead of using a scanning electron beam to create an image, a DVST uses an array of electron guns that fire beams of electrons directly onto the phosphorescent coating.

The electrons cause the phosphorescent coating to emit light, creating an image on the screen. The image is retained on the screen even after the electron beams have stopped firing, making it possible to display static images without flicker.

DVSTs were used in applications such as radar displays, flight simulators, and early computer graphics systems. They had several advantages over CRTs, including a lack of flicker, a longer persistence time, and a more uniform image brightness.

However, DVSTs also had several disadvantages. They were heavy and bulky, consumed a lot of power, and had a limited resolution and color depth. As a result, they were largely replaced by CRTs in the 1970s and 1980s, and by modern flat panel displays in the late twentieth century.