Ensayo

Televisions are complex devices and are the result of a century of invention and development. However, the principles remain the same and are very simple. 
A picture is captured by a camera bybreaking the image into a series of dots or pixels across the width of the picture. Each string of dots makes up one line of the image. In an HD signal, there are 1920 dots in each line and 1080 lines fromtop to bottom.

As each dot is captured, the amount of red, green and blue light is recorded as three numbers. These numbers are sent as a continuous stream of data. When the whole image has beensent, the whole process starts over to deliver the next image. The images are captured 25 or 30 times every second.

The television receives the stream of data and decodes it into a brightness foreach of the three colors in every pixel.

There are many other processes that go on alongside this process but the description shows the main principle - Identical to the one used by John Logie Bairdin 1925.

The picture isn’t made with paints, or ink, or anything in your art supplies. It’s actually made with light! Thousands of tiny dots or stripes of light are used to make a full picture onour TV screens. There are usually three primary colors of light that are used: red, green, and blue. By using those three colors in different combinations, our TVs can make any color we can think of!How does a TV know which colors to display? A video signal comes into the TV from antennas, satellite dishes, cable or other TV services. It’s an electrical signal that tells the TV’s speakers whatsounds to make, and it tells the screen which colors of light it should show. Many TVs use what’s called a cathode-ray tube, which actually shoots beams of energy (electrons) at the backs of our TVscreens. These beams are so precise that they can hit just one tiny red, green, or blue point on the screen. When they hit, a small part of the TV screen shines as one of those colors! The rays of...