The Cathode Ray Tube (CRT) is a technology that has been used for many years in television and computer monitors. It consists of an evacuated glass tube with two electrodes, called the cathode and the anode.
The cathode emits electrons which are attracted to the positively charged anodes on either side of it. These electrons then travel through a vacuum between them, striking phosphors coated on the inside face of the tube’s screen, creating light that forms images visible to viewers or users.
The CRT was invented by German physicist Karl Ferdinand Braun in 1897 as part of his work on wireless telegraphy systems at Siemens & Halske AG in Berlin-Charlottenburg Germany. Since its invention, it has become one of the most widely used technologies for displaying information due to its ability to display full-color images with excellent resolution and contrast ratio compared with other technologies available at that time such as black-and-white television sets or early computer displays using Nixie tubes.
Although modern LCDs have largely replaced CRTs due to their superior energy efficiency, there are still some applications where they remain useful today such as medical imaging equipment like X-ray machines, oscilloscopes, radar screens, etc., where high refresh rates and fast response times are required from these devices.
Moreover, since they do not suffer from motion blur issues like LCDs do when displaying rapidly moving objects this makes them ideal for video games designed primarily for use in arcade cabinets or home consoles produced before the 2005 era when flat panel displays began taking over the market share from traditional CRT’s dominance within the consumer electronics industry.