LCD Monitor and CRT Monitor


The outdated CRT or Cathode Ray Tube screens are being replaced by LCD or Liquid Crystal Display panels, which are far superior in the great majority of applications.


Compared to the outdated CRT Displays, LCD Monitors provide a number of benefits. While CRT displays are heavy and bulky and can use up to 150W of electricity, LCD monitors are small, light, and only use about 20W of power. In contrast to CRT monitors, which have limited sharpness and a tendency to blur more at high brightness levels and as the tubes age, LCD monitors generate completely crisp images with flawless image geometry. CRT monitors also suffer from geometric distortions.


In contrast to CRT monitors, which display very bright spots that may cause other sections of the image to dim and have poor text contrast due to their bandwidth limitations, LCD monitors have a constant tonal scale and can display text with high contrast.


While a CRT monitor’s mild flicker can always be seen, LCD monitors typically don’t.


Additionally, LCD monitors have several built-in drawbacks compared to CRT monitors. In an LCD monitor, the contrast or color might vary depending on the viewing angle, but a CRT monitor always displays a constant image. Motion blur and poor black on dark images are potential problems with LCD monitors. While CRT monitors often depict motion well and have an excellent black to white contrast ratio.


On an LCD monitor, images may appear flat and the peak brightness is constrained by the back light. An image with a very high peak brightness is displayed on a CRT monitor with a glitter and vitality.


If LCD Monitor screens are damaged, it may develop stuck pixels whereas no such pixel based problems are present.


In LCD the natural interface would be digital e.g. DVI interface and the image can be sub-optimal with analog interface whereas CRT’s are naturally suited to analog interface.


On the basis of visual quality, LCD monitors are best suited for technical/CAD applications and office purposes, such as large, intricate text-based but unimportant color graphics, whereas CRT continues to be superior for high-end photography or art work and for television displays.


An LCD really absorbs white light and filters it to produce the necessary colors, in contrast to CRTs which actively display the light through coated phosphors. Three subpixels, one for each color of light—red, green, and blue—are used to do this for a particular pixel. The filter will block that particular color of light when the sub-pixel is off. The sub-pixel will open the filter to let through the specified quantity of light when it is on.


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