CRT

Understanding CRT technology

Cathode ray tubes, or CRTs, utilize an electron gun and a vacuum tube to project images onto a fluorescent screen. Color monitors use three electron guns for shooting three different electron beams onto the screen coated with either strips or dots of phosphors that emit red, blue or green. A stream of electrons speeds through the vacuum and hits a phosphorus-coated screen where it lights up.

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A series of wire coils control the direction of the electrons. One set controls the vertical direction and another set controls the horizontal. Voltage applied to the coils controls the electron beam position. These CRT monitors are typically heavy and are very fragile. If the screen were dropped or hit, it would implode due to the vacuum pressure inside the tube.

CRT Televisions

Early black and white televisions only used a single electron gun to produce an image. There was only one type of phosphor, which would light up white when hit by electrons. Because of the way the image was made on the screen, it was often seen as a series of lines scrolling down the screen. Older color monitors were very large and deep. With the advancement of new technology, CRTs like the Samsung CRT have become much shallower. This allows for larger monitors to sit on shallower TV stands. As well manufacturers have listened to public opinion and have developed the CRT HDTV. HDTV on a CRT display is limited to a smaller size than what is available in a plasma or LCD because of the depth of the TV.

CRT Monitors

Technology development has also given way to the flat CRT. This should be distinguished from flat panel monitors in that it is the screen surface, not the entire monitor, that is flat. This gives a flatter viewing area and provides less visual distortion than the rounder screens did. Another key benefit is that the monitors can be manufactured slimmer. Some of these types of monitors utilize nano-pigment screens to produce high color, contrast and candela brightness. Computer gaming is better on a CRT because of the clear picture and lossless imaging. Comparable LCD monitors will have pixel distortion creating blurring at the high frame rates games require.