Display – electronic surface-mounted device for displaying information. CRT monitor, cathode-ray tube – cathode-ray tube used as a computer monitor. In this type of monitors, to display the image, an electron beam is used, fired from an electronic gun (usually a cathode gun), which can be deflected magnetically (by means of horizontal and vertical deflection coils) and falls on the phosphor, causing it to be excited to light.
Practical display board in use
The term CRT was used in Polish only after alternative means of displaying images on computer monitors and TV sets had been introduced to the market. This was mainly after the introduction of LCD monitors, as there were no non-CRT solutions before. display board
Characteristics of the CRT display
The screen area occupied by the displayed image is smaller than the nominal screen area, e.g. on a 15″ monitor the actually displayed image has a diagonal measurement of approx. 14″.
It has a small spot size and inertia; in the mid-1990s spot monitors with a diameter of more than 0.28 mm were removed from production; high-end 17″ and 19″ CRT monitors have a spot diameter of less than 0.25 mm.
It has better color reproduction and much deeper black than a LCD monitor of the same class. The viewing angle of the monitor does not affect color reception. Ambient temperature does not affect the colour display, especially as these monitors generate a lot of heat.
Display board advantages and disadvantages
It is much bigger and heavier than its successors, its weight reaches tens of kilos; the declining flat screen versions have an even deeper casing than the standard ones.
Spherical screen versions are typically 14″ or 15″ monitors, while the later versions, with a roller or even flat screen, are 17″ or 19″ monitors. Larger diagonals are very rare.
Often its electricity consumption was over 100 W.
The screen resolution can be set dynamically (smoothly) without any scaling problems, only at limit resolutions the so-called moire effect appears. There are no problems with native resolution in this solution.
Due to many inconveniences, CRT monitors have been pushed out of the market by newer liquid crystal display technology, although their first models generated much poorer image quality. Lower prices, weight, power consumption and appliance sizes were more important.