How does a color television function?

Answer 1

That is a huge question to be answered in one page. It requires understand of many scientific principles. Electronics, radio propagation, light and computer technology (these days).

Taking your question at it's most simplest:-

A TV receiver picks up a radio signal, that has been encoded and transmitted from a nearby station.

The signal is decoded inside the TV and a continuous stream of data is sent to the screen, line by line.

The picture is scanned across the screen from left to right, from top to bottom, making up a picture. Because your eyes average out fast changes in light, you don't see this line being drawn.

Each picture (or frame) is redrawn again from the top down. Again you don't see this, but you do see the differences in each picture, giving motion to the scene.

Early TVs used an electron beam fired at a phosphor coated glass screen, to make the picture. Modern TVs use a matrix of cells in liquid crystal or plasma cells, which are individually affected by addressing from a computer within the TV.

Answer 2

Color TV works by putting sending more or less power through lights of different colors. In the old cathode ray tube (CRT) TVs, this was done with a phosphorus screen and a proton particle beam. In newer LCD and plasma TVs, each pixel is a light and is turned on or off in varying degrees of intensity.

Answer 3

if you mean how do they make the color on a tv then in its most basic form, a color broadcast can be created by broadcasting three monochrome images, one each in the three colors of red, green and blue (RGB). When displayed in fast succession, these colors will blend together to produce a single color as seen by the viewer.

On older TVs do not if it works on plasma or lcd, but if you held a magnifying glass to the screen you could see the three colored dots

Answer 4

Look closely at a small portion of a color TV screen with a magnifying glass. You will see the three colors of red, blue and green rather the colors you see from a distance. The colors of images on a TV screen are formed only by these three colors in varying degrees of brightness. These colors are the three primary colors of light and all other colors can be made by combinations of these three. For example, if the three colors are mixed equally, white results. The color yellow is produced by mixing red and green, while purple is a mixture of red and blue. When there is no color displayed, black results. There are three corresponding kinds of cells in the human eyes, each of which recognizes one of the three primary colors of light. The human brain interprets various colors by judging the strength of each color in an integrated way. Similarly, a TV camera captures colors as the strength of each of the three primary colors and when a color TV reproduces that mixture, a full range of colors is seen in human eyes.

Answer 5

The television is a pretty neat invention. You can turn it on and change the channel to watch what you want.

Answer 6

The screen is a combination of squares. Each square can show two colors at a time. Making the thousands of squares an image you see today!