We first realized the impact of TV during the mid-1900s. U.S. citizens had been reading about the civil rights struggle for decades. But, it was only when TV came along in the 50s and 60s and viewers saw in TV news footage what was really happening, that the country amassed political pressure to take action to change things.
Interactive television (ITV) represents the convergence of interactive technology and television which allows the exchange of information between the sender and the receiver. Potentially, it offers increased control over programming content by enabling the viewer to immediately respond to the programming--and even alter it. By offering such control, interactive television has the potential to redefine what producers of television and viewers mean by "television" and to redefine communication processes in society.
History of 3D: 1890-English filmmaker and inventor William Friese-Greene projected both left and right images on one screen and provided people with red and green glasses, resulting in a 3D effect when watching the film.
1922-The first 3D movie, The Power of Love, was released;red and green polarized films were viewed through red and green glasses to create the 3D effect.
1970-Film Director Allan Sollipant and Opticist Chris Condon created a new 3D technology called Stereovision. This new 3D method replaced the use of two separate films on two screens with a new 3D film that was projected onto a single screen.
2004-The first IMAX 3D movie, The Polar Express, was released.
2010-The release of Oscar-winning Avatar brought renewed interest to 3D television. 3D TVs using Shutter Glasses 3D technology launched in 2010. This technology was followed by FPR (Film Patterned Retarder) 3D technology. FPR allows viewers to enjoy the 3D TV experience while wearing lightweight battery-free glasses.
Plasma televisions are the latest display technology and the best way to achieve flat panel television displays with excellent image quality and large screen sizes viewable in any environment. Plasma screen televisions are made up of an array of cells, known as pixels, which are composed of 3 sub-pixels, corresponding to the colors red, green and blue.
The first color system was developed by John Logie Baird in 1928. It used mechanical techniques. In the early 1940s, CBS pioneered a system which transmitted an image in each of the three primary colors sequentially. A wheel with segments of red, green, and blue rotated in front of the camera, while a similar wheel rotated in front of the television screen, synchronized to the one at the camera. The system was simple and produced excellent pictures, though it had many drawbacks, including low resolution, flicker, and most signifcant, it wasn't compatible with existing black and white broadcasting.
The type of coaxial cable we are most aware of is the wire that connects our televisions to our cable boxes. It then, in turn, connects our cable boxes to the wall outlet to receive TV signals. Coax has been around a lot longer than most people think. 1894 – The U.S. Patent office awards renowned inventor Nikola Tesla with the first electrical conductor patent. These three technologies combined were the key components necessary to construct the coaxial cables we use today.
In the 1920's Russian immigrant Vladimir Kosmo Zworykin patented two inventions. The first was the Iconoscope, which essentially was a rudimentary video camera, and the second was the kinescope, precursor to the modern television tube. Zworykin was working for Westinghouse at the time, and when RCA broke away from Westinghouse and GE, he went to work for RCA with the encouragement of its leader David Sarnoff. During the 1930's Zworykin continued to develop the Kinescope, and it evolved into the tubes used in RCA's first commercial TV's shown at the 1939 World's Fair. But sole credit for electronic television cannot go to Zworykin as another inventor in Utah, Philo T. Farnsworth had sketched out a rudimentary system in 1922 while still in high school. Farnsworth patented his version of TV, and RCA eventually realized these patents would have to be licensed to achieve commercial implementation of television. Another inventor in Hungary named Kalman Tihanyi also developed an electronic television system that wasn't acknowledged until years later. The Kinescope was a modification of the Cathode Ray Tube or CRT, which itself was a descendant of the Crookes Tube. William Crookes made the discovery that current moves from a negative cathode terminal to a positive anode terminal inside an evacuated tube. Karl Ferdinand Braun later perfected the means of channeling this current through an anode ring so the cathode ray could be projected onto a fluorescent coating at the opposite end of the tube.
Electromechanical television (black and white). This was the first ever telelvision. Could show grainy moving images in black in white with no sound. Only the richest people had them.
The history of television technology can be divided along two lines: those developments that depended upon both mechanical and electronic principles, and those which are purely electronic. From the latter descended all modern televisions, but these would not have been possible without discoveries and insights from the mechanical systems. The word television is a hybrid word, created from both Greek and Latin. Tele- is Greek for "far", while -vision is from the Latin visio, meaning "vision" or "sight". It is often abbreviated as TV or the telly.
The television has become such an integral part of homes in the modern world that it is hard to imagine life without television. The boob tube, as television is also referred to, provides entertainment to people of all ages. Not just for entertainment value, but TV is also a valuable resource for advertising and different kinds of programming.