INVENTIONS THAT CHANGED THE WORLD
1. HISTORY
Television was not invented by a single person, but by several individuals. The origins of what would become today's television system can be traced back to the discovery of the photoconductivity of the element selenium by Willoughby Smith in 1873. The telectroscope was a hoax based on an article published in The New York Sun of 29 March 1877 and popularized by French editor Louis Figuier. Paul Nipkow proposed the first practical television principle based on a scanning disc in 1884, but the Nipkow principle had to wait until suitable amplifiers were developed before it became practical. All practical television systems use the fundamental idea of scanning an image to produce a time series signal representation. That representation is then transmitted to a device to reverse the scanning process. The final device, the television (or TV set), relies on the human eye to integrate the result into a coherent image.
A transistor-based portable television, typical of NTSC models of the late 1960s and 1970s
Electromechanical techniques were developed from the 1900s into the 1920s, progressing from the transmission of still photographs, to live still duotone images, to moving duotone or silhouette images, with each step increasing the sensitivity and speed of the scanning photoelectric cell. John Logie Baird gave the world's first public demonstration of a working television system based on the Nipkow principle that transmitted live moving images with tone graduation (grayscale) on 26 January 1926 at his laboratory in London, and built a complete experimental broadcast system around his technology. Baird further demonstrated the world's first color television transmission on 3 July 1928. Other prominent developers of mechanical television included Charles Francis Jenkins who demonstrated a primitive television system in 1923, Frank Conrad who demonstrated a movie-film-to-television converter at Westinghouse in 1928, and Frank Gray and Herbert E. Ives at Bell Labs who demonstrated wired long-distance television in 1927 and two-way television in 1930. Camarena invented the "Chromoscopic adapter for television equipment", an early color television transmission system. As it is written in the patent: The invention relates to the transmission and reception of colored pictures or images by wire or wireless. Even though the invention was not already adaptable to standard television equipment then in use; the invention was considered easy to adapt to any transmitter or receiver of black and white television equipment. He applied for this patent August 14, 1941 and obtained the patents for color television systems September 25, 1942 (U.S. Patent 2296019), 1960 and 1962.
Color television systems were invented and patented even before black-and-white television was working; see History of television for details.
Completely electronic television systems relied on the inventions of Philo T. Farnsworth, Vladimir Zworykin (disputed as his product did not produce a satisfying image) and others to produce a system suitable for mass distribution of television programming. Farnsworth gave the world's first public demonstration of an all-electronic television system at the Franklin Institute in Philadelphia on 25 August 1934. All modern television systems derive directly from Farnsworth's model.
A transistor-based portable television, typical of NTSC models of the late 1960s and 1970s
Electromechanical techniques were developed from the 1900s into the 1920s, progressing from the transmission of still photographs, to live still duotone images, to moving duotone or silhouette images, with each step increasing the sensitivity and speed of the scanning photoelectric cell. John Logie Baird gave the world's first public demonstration of a working television system based on the Nipkow principle that transmitted live moving images with tone graduation (grayscale) on 26 January 1926 at his laboratory in London, and built a complete experimental broadcast system around his technology. Baird further demonstrated the world's first color television transmission on 3 July 1928. Other prominent developers of mechanical television included Charles Francis Jenkins who demonstrated a primitive television system in 1923, Frank Conrad who demonstrated a movie-film-to-television converter at Westinghouse in 1928, and Frank Gray and Herbert E. Ives at Bell Labs who demonstrated wired long-distance television in 1927 and two-way television in 1930. Camarena invented the "Chromoscopic adapter for television equipment", an early color television transmission system. As it is written in the patent: The invention relates to the transmission and reception of colored pictures or images by wire or wireless. Even though the invention was not already adaptable to standard television equipment then in use; the invention was considered easy to adapt to any transmitter or receiver of black and white television equipment. He applied for this patent August 14, 1941 and obtained the patents for color television systems September 25, 1942 (U.S. Patent 2296019), 1960 and 1962.
Color television systems were invented and patented even before black-and-white television was working; see History of television for details.
Completely electronic television systems relied on the inventions of Philo T. Farnsworth, Vladimir Zworykin (disputed as his product did not produce a satisfying image) and others to produce a system suitable for mass distribution of television programming. Farnsworth gave the world's first public demonstration of an all-electronic television system at the Franklin Institute in Philadelphia on 25 August 1934. All modern television systems derive directly from Farnsworth's model.
Samsung LE26R41BD HDTV
Ambilight™
Broadcast flag
CableCARD™
Digital Light Processing (DLP)
Digital Rights Management (DRM)
Digital television (DTV)
Digital Video Recorders (DVR)
Direct Broadcast Satellite TV (DBS)
DVD
HD DVD
Blu-ray Disc
Flicker-free (100 Hz or 120 Hz, depending on country)
High Definition TV (HDTV)
High-Definition Multimedia Interface (HDMI)
IPTV
Internet television
Laser TV display technology
LCD and plasma display flat screen TV
SED display technology
OLED display technology
P2PTV
Pay-per-view
Personal video recorders (PVR)
Picture-in-picture (PiP)
Pixelplus
Placeshifting
Remote controls
The Slingbox
Timeshifting
Video on-demand (VOD)
Ultra High Definition Video (UHDV)
Web TV
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