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Represents "CRT." CRT is a technology used in conventional computer monitors and televisions. The image on the CRT display is generated by emitting electrons from the back of the tube to the phosphor located in front of the display. When electrons collide with the phosphor, they are irradiated and projected onto the screen. The colors displayed on the screen are usually mixed with red, blue, and green light called RGB.

Electron flow is induced by magnetic charge. As a result, it may be disturbed by unshielded speakers or other magnetic devices located near the CRT display. This problem does not exist because the flat screen or LCD display does not require magnetic charging. Since the liquid crystal display also does not use a tube, it is thinner than a CRT display. Because the color is sharp and accurate, the CRT display is still being used by graphic professionals, but the LCD display now matches the quality of CRT display. Therefore, flat panel displays are replacing CRT displays in the consumer and expert markets.

The first computer monitor used a CRT (cathode ray tube). Prior to the emergence of home computers in the late 1970s, it was common for video display terminals (VDT) using CRT to be physically integrated with the keyboard and other components of the system in a single large chassis . Since the display is black-and-white, it is much clearer and less detailed than the modern flat panel display, so it requires relatively large text and severely limits the amount of information that can be displayed at one time. High resolution CRT displays are developed for military, industrial, and scientific professional applications but are too high for general use

In 1934, the first CRT TV was supplied by Telefanken in Germany. Since then, CRT technology has been improved several times and used on computer monitors and televisions. CRT monitors and televisions are widely used throughout the world until the 2000s when LCD technology became popular and replaced with CRT.

The first TV on the market was made of CRT, but this is a tedious technique to produce inconsistent images on TV. This problem is particularly bad at the edge of the screen, so CRT TVs are overscanned to compensate for this problem. In overscanning, the image itself is slightly enlarged, so the edge is outside the boundary of the display area. Broadcasters are hoping that certain images will be clipped, so I would like to prevent important information from being displayed too close to the edge of the screen. Historically, there is a title security area indicating that there is no distortion in the text, and an action safe area where the image can be safely displayed.

Computer graphics was introduced in the early 1950's to display data and raw images on paper maps or CRT screens. The availability of expensive hardware and limited software has made it possible to develop this field until the early 1980s, when the computer memory required for bitmap graphics is affordable. (A bitmap is a binary representation in the main memory of an array of rectangular dots on the screen.) Since the first bitmap displays 1 bit per pixel, usually only one of the two colors, black and green On modern computers with more memory, more bits were allocated per pixel to get more colors.) Bitmap technology, high resolution display, and graphic standards Develop explosive growth in this area. For more information on computing development, see Computer, History.