PRODUCTION OF COLORED IMAGES IN A TELEVISION

[marjl_404]

[b][color=blue]I NEED A PROFESSIONAL HELP REGARDING THIS TOPIC.
I WANT TO KNOW WHAT ARE THE FACTORS THAT AFFECT IN THE PRODUCTION OF COLORED IMAGES IN A TELEVISION.
PLEASE HELP ME....
THANK YOU VERY MUCH FOR YOUR GENEROSITY. I APPRECIATE YOUR TIME FOR READING MY POST. THANK YOU!!!! [/color][/b]

[scibudadmin]

Try looking up this site for a good explanation. Keys to illuminating the screen are the colored phosphors and the cathode ray which is aimed at them and activates them. Different logic and mechanisms that are interesting to look into are how the right e- beam is sent to the right phosphor location to make the picture, how the e-beam tracks across the screen, returning from one side to the other, so quickly, and how it refreshes the image so often that you think its moving when each image is actually still.

http://electronics.howstuffworks.com/tv3.htm

The Cathode Ray Tube
Almost all TVs in use today rely on a device known as the cathode ray tube, or CRT, to display their images. LCDs and plasma displays are sometimes seen, but they are still rare when compared to CRTs. It is even possible to make a television screen out of thousands of ordinary 60-watt light bulbs! You may have seen something like this at an outdoor event like a football game. Let's start with the CRT, however, because CRTs are the most common way of displaying images today.

The terms anode and cathode are used in electronics as synonyms for positive and negative terminals. For example, you could refer to the positive terminal of a battery as the anode and the negative terminal as the cathode.

In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass "tube." The "ray" is a stream of electrons that naturally pour off a heated cathode into the vacuum.

Electrons are negative. The anode is positive, so it attracts the electrons pouring off the cathode. In a TV's cathode ray tube, the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. This tight, high-speed beam of electrons flies through the vacuum in the tube and hits the flat screen at the other end of the tube. This screen is coated with phosphor, which glows when struck by the beam.

Posted for Kraig