Kenjiro Takayanagi

Kenjiro Takayanagi was a Japanese engineer who developed an early fully electronic television system, demonstrating a cathode-ray-tube receiver in 1926.

Cathode-ray tube: A vacuum tube that produces images by directing an electron beam onto a phosphor-coated screen. Takayanagi used a cathode-ray tube to display the received image.
Hamamatsu: A city in Shizuoka Prefecture, Japan, known as the birthplace of Kenjiro Takayanagi. Takayanagi was born in Hamamatsu in 1899.
Television scanning: The process of converting an image into ordered lines for transmission and display. Scanning transformed the letter Takayanagi transmitted into a sequence of image elements.
Philo Farnsworth: An American inventor who developed an all-electronic television system and demonstrated image transmission in 1927. Farnsworth’s independent system followed Takayanagi’s earlier cathode-ray demonstration.
Nipkow disk: A rotating disk with spiral holes that scans an image into successive lines for mechanical television. Takayanagi’s electronic receiver replaced the mechanical image-scanning approach associated with this device.
Tokyo Institute of Technology: A Japanese national research university specializing in science and engineering. Takayanagi studied engineering at its predecessor, the Tokyo Higher Technical School.
Television signal: An electrical signal carrying image information for television display or broadcast. The system transmitted picture information electrically from its scanning apparatus to the receiver.
Vladimir K. Zworykin: A Russian-born American engineer whose inventions helped establish electronic television cameras and receivers. His work and Takayanagi’s formed distinct paths toward practical electronic television.
Television camera tube: An electronic device that converts an optical image into a signal for television transmission. It supplied the image signal in electronic television systems, complementing Takayanagi’s display work.
Shizuoka University: A Japanese national university formed in 1949 from institutions including Hamamatsu Technical College. Takayanagi conducted television research at Hamamatsu Technical College, one of its predecessors.

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