Презентация на тему TELEVISION AND TELECOMMUNICATION

of TV.
TV in process of development.
TV

systems in close up.
Conclusion

for sending (broadcasting) and receiving moving images, either monochromatic

(blаcк and white) or colour, usually accompanied by sound.

included only those devices employing a combination of optical,

mechanical and electronic technologies to capture, transmit and display a visual image.

university student in Germany invented the first electromechanical television

system which employed a scanning disk, a spinning disk with a series of holes spiraling toward the center, for rasterization.

such that in a single rotation the disk would

allow light to pass through each hole and onto a light-sensitive selenium sensor which produced the electrical pulses. As an image was focused on the rotating disk, each hole captured a horizontal "slice" of the whole image.

the beginning of the 1930th years, and mechanical television

appeared for the first time on air.

the first electromechanical television system in 1884 of Paul

G. Nipkow

Karl Braun in 1927 invented televisions depended also upon the cathode-ray tube.

Liquidly - the Crystal(LC) TV

Your attention!