1. LED Display:
An LED display is a flat panel display, which uses an array of light-emitting diodes as pixels for
a video display. Their brightness allows them to be used outdoors in store signs and billboards, and in
recent years they have also become commonly used in destination signs on public transport vehicles. LED
displays are capable of providing general illumination in addition to visual display, as when used for stage
lighting or other decorative (as opposed to informational) purposes.
Advantages and Disadvantages of LED Screen:
The basic advantage is the appearance of LEDs, which look too awesome. It provides the slim screen with
sleek design which is adjustable at any place. LEDs are far better than LCD monitors because they do not
use fluorescent bulbs due to which they are lighter and thinner in weight. LEDs consume less energy and
save a lot of power. LEDs provide bright image quality by enhancing the contrast and enriching the range
of colors. The wavelength ranges of lights used are such that to give high quality. Once you buy the LED
then you save in terms of money and time for its maintenance. LEDs don’t produce heat because they do
not contain the fluorescent bulbs which can also cause damage by short-circuiting.
LEDs top most disadvantage is the price rate at which they are available in the market, which is very
expensive, so they are not easily affordable for common people. They largely depend on the correct
engineering otherwise a lot of deterioration and defects can develop in the products. They shift color with
age and white LEDs are inconsistent as thermal instability is a very common fault in it. Knowledge gap is
big between the users and the manufacturers due to which users don’t understand how it works and the
basic design. So in short LEDs are too good as it is the most latest and efficient technology for users to
see videos in high definition.
2. Cathode ray tube:
The cathode ray tube (CRT) is a vacuum tube that contains one or more electron guns and
a phosphorescent screen, and is used to display images. It modulates, accelerates, and deflects electron
beam(s) onto the screen to create the images. The images may represent
electrical waveforms (oscilloscope), pictures (television, computer monitor), radar targets, or others.
CRTs have also been used as memory devices, in which case the visible light emitted from the fluorescent
material (if any) is not intended to have significant meaning to a visual observer (though the visible
pattern on the tube face may cryptically represent the stored data).
