Below are some key differences between CRT and LCD.

CRT (Cathode-Ray Tube)

CRT is composed of a vacuum tube where two or more electronic guns are used, and the image is produced by shooting electronic beams in which each beam represents one colour of video or image. These beams are collected at phosphor target, at the back of the screen, to produce display.

CRT uses more power than LCD. The resolution is lower than the LCD, while the response time is faster than LCD. The CRT is heavier than LCD. The main components of CRT include electron guns, glass tube, deflection plates and phosphor target. Due to use, the tube CRT is bigger in size. There is image flickering in CRT display. There is no image retention in CRT. 

CRT is mostly used in old televisions and monitors. The cost of the CRT is less than that of LCD. CRT can be easily affected by the external magnetic field. There is no image confinement in CRT. The CRT technology is becoming old and obsolete, and the demand for CRT is also low in present times.

LCD (Liquid Crystal Display) 

LCD uses the liquid crystal to display images on the screen. The liquid reflects the light from the bottom of the monitor to the display screen. The display of LCD is quite better than CRT and provides a quite natural display. LCD uses less power as compared to CRT. The resolution of LCD is higher as compared to CRT, but the response time is slower than that of CRT. LCD is mostly lightweight. The main components of LCD include liquid crystal, glass filters, mirror and electrodes. LCD is thinner than CRT, as there is no use of a tube. There is no image flickering in the LCD display. LCD has image retention.

LCD is used in laptops, flat screens, and mobile phones. LCD is costly as compared to CRT. LCD is mostly affected by extreme temperatures, whether hot or cold. There is image confinement in LCD. There are further developments in progress regarding LCD, and the demand for LCD is also quite high.