TELEVISION - Julianne Aerts

TIMELINE OF TELEVISION

1862 • Inventor Abbe Giovanna Caselli becomes the first person to trasmit still images over wires with his creation of the Pantelegraph
1880 • Inventors Alexander Graham Bell and Thomas Edison theorize about telephone devices that transmit image as well as sound • Bell's Photophone used light to transmit sound and he wanted to advance his device for image sending 1900 • Soon after 1900, the momentum shifted from ideas and discussions to physical development of television systems. Two major paths in the development of a television system were pursued by inventors o mechanical television systems based on rotating disks (followed by American Charles Jenkins and Scotsman John Baird) o electronic television systems based on the cathode ray tube developed independently in 1907 by English inventor A.A. Campbell-Swinton and Russian scientist Boris Rosing. o Electronic television systems eventual replaced mechanical systems.
1906 - First Mechanical Television System • Lee de Forest invents the Audion vacuum tube that proved essential to electronics. The Audion was the first tube with the ability to amplify signals • Boris Rosing combines Nipkow's disk and a cathode ray tube and builds the first working mechanical TV system
1907 Early Electronic Systems • Campbell Swinton and Boris Rosing suggest using cathode ray tubes to transmit images. Independent of each other, they both develop electronic scanning methods of reproducing images 1923 • Vladimir Zworkin patents his iconscope a TV camera tube based on Campbell Swinton's ideas. The iconscope, which he called an electric eye becomes the cornerstone for further television development. Zworkin later develops the kinescope for picture display (aka the reciever)
1924/25 First Moving Silhouette Images • John Baird becomes the first person to transmit moving silhouette images using a mechanical system based on Nipkow's disk • Vladimir Zworkin patents a color television system
1929 • Vladimir Zworkin demonstrates the first practical electronic system for both the transmission and reception of images using his new kinescope tube
1930 • Charles Jenkins broadcasts the first TV commercial • The BBC begins regular TV transmissions
1936 • About 200 hundred television sets are in use world-wide • The introduction of coaxial cable, which is a pure copper or copper-coated wire surrounded by insulation and an aluminum covering. These cables were and are used to transmit television, telephone, and data signals • RCA's David Sarnoff used his company's exhibit at the 1939 World's Fair as a showcase for the 1st Presidential speech (Roosevelt) on television and to introduce RCA's new line of television receivers, some of which had to be coupled with a radio if you wanted to hear sound
1946 • Peter Goldmark, working for CBS, demonstrated his color television system to the FCC. His system produced color pictures by having a red-blue-green wheel spin in front of a cathode ray tube
1948 • Cable television is introduced in Pennsylvania as a means of bringing television to rural areas.
1950 • The FCC approves the first color television standard, which is replaced by a second in 1953 • Robert Adler invents the first practical remote control called the Zenith Space Commander. It was proceeded by wired remotes and units that failed in sunlight
1960 • The first split screen broadcast occurs on the Kennedy - Nixon debates
1964 • Television broadcast companies considered developing plasma television as an alternative to televisions using cathode ray tubes
1967 • Most TV broadcasts are in color
1969 • July 20, first TV transmission from the moon and 600 million people watch
1972 • 50% of home TV’s are in color
1982 • Dolby surround sound for home sets is introduced
1984 • Stereo TV broadcasts approved
1986 • Super VHS introduced
1990 • Digital formatting introduced
1998 • First HD TV hits market
2006 • Television signals are in both analog and digital formats
2009 • Analog format cancelled and everything is now in digital formatting



SOURCES http://www.history-timelines.org.uk/events-timelines/08-television-invention-timeline.htm http://www.howstuffworks.com/hdtv.htm http://inventors.about.com/od/tstartinventions/a/Television_Time.htm