evolution of tv

1. EVOLUTION OF TELEVISIONS

2. Evolution of televisions
Then and now

3. TELEVISION
• Medium for transmitting and receiving moving
images,
• Either monochromatic ("black and white") or
color, accompanied by sound.
• One of the biggest advertisers.
• Best medium of entertainment and awareness

4. BIRTH OF WORD TELEVISION
TELEVISION

5. INVENTOR OF TELEVISION
• John Logie Baird who was born on the 13th
August 1888 in
Helensburgh, Dumbarton,Scotland.

6. THE HISTORY/ TIMELINE
• 1900, Tesla granted U.S. patent
• 1904, Fleming invents the TV but not
successful.
• 1906, First Christmas Eve program was shown,
• 1912, Radio signal amplifier deviced launched

7. • 1920, first scheduled commercial radio
programmer launched,
• 1926, television system invented by JOHN LOGIE
BAIRD,
• 1947, transventor is invented
• 1954, first coast-to-coast color TV transmission
started.

8. TYPES OF TELEVISIONS
• Cathode Ray Tube (CRT) – since the mid-1930s.
• Rear Projection – The video image is projected
from inside the unit onto a mirror that reflects
the image back to the screen.
• Front Projection- projector’s.
• Plasma – flat-panel televisions, 42 to 56 inches
on average and are generally only available in
larger sizes.

9. Liquid Crystal Display (LCD) – the most common
type of television these days and are sizes from
15 to 55 inches.
Light Emitting Diode (LED) - uses light-emitting
diodes (LEDs) to backlight the display.
3D – conveys depth perception to the viewers.

10. MATERIAL USED
•
•
•
•
•
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CRT (cathode ray tube)
Tubes
Diodes
Resistors
capacitors and inductors
Chassis box made of wood and fibers.

11. EFFECTS ON SOCIETY
• Thanks to the News.
• Entertains people with various television
shows.
• Influence the way people think, and
manipulate their decisions
• Promotes awareness in affective way.

12. TIMELINE OF THE TELEVISION
• In 1862 Abbe Giovanna Caselli invents his
Pantelegraph and becomes the first person to
transmit a still image over wires.
• Then in 1906 Lee de Forest built a vacuum tube
that worked in the first mechanical working
television.
• In 1940 Peter Goldmark invents the first color
television with 343 lines of revolution.

13. • In 1948 cable television was introduced in
Pennsylvania.
• In 1981 NHK demonstrates the HDTV which
had 1,125 lines of revolution.
• In 1992 the first 21-inch full color plasma TV
was introduced
• In 2010 the first 3-D televisions were put on
the market.

14. ENVIRONMENTAL ASPECTS
• Contains a lot of lead
• LCD TVs use lamps that contain mercury so they
are harder to dispose of.
• People don’t know how to dispose of televisions
properly.
• Now there is a big concern about electronic
waste.
• The newer TVs are requiring more electrical
power to run.

15. IMAGES
1920
1930
1940
1950

16. 1960
1970
1990
1980
2000

17. 2010 – 3D Generation

18. MAJOR CHANGES OF TELEVISIONS
• in 1936, coaxial cable was invented to
transmit TV signals.
• The first TV started out with black and white
pictures until 1940.
• in 1948 cable became available and provided
more channels .

19. • 1956 - first remote control was made for the
TV that was made with wires.
• Later the first HDTV was made for viewers to
get a better and higher quality image.
• And in 2010 the first 3D TVs were sold letting
viewers watch their programs in 3D.

20. COMPLETED AND SUBMITED BY
SAHIL MUKHIA