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A CRT in a TV is commonly called a picture tube. CRTs have also been used as memory devices , in which case the screen is not intended to be visible to an observer. The term cathode ray was used to describe electron beams when they were first discovered, before it was understood that what was emitted from the cathode was a beam of electrons.
The biggest problem with many picture tubes is the loss of emission or electron production due to contaminated or damaged cathode that surrounds the heater. The 7JP4 was used in the following sets (incomplete list): Motorola VT-71 Motorola VT-73 Hallicrafters 504, 505, T-54 Sentinel TV-400 Sentinel TV-405 National TV-7W Philco 50-T701 & 50-T702 ...
Allen Balcom DuMont, also spelled Du Mont, (January 29, 1901 – November 14, 1965) was an American electronics engineer, scientist and inventor who improved the cathode-ray tube in 1931 for use in television receivers.
The Trinitron design incorporates two unique features: the single-gun three-cathode picture tube, and the vertically aligned aperture grille. The single gun consists of a long-necked tube with a single electrode [dubious – discuss] at its base, flaring out into a horizontally-aligned rectangular shape with three rectangular cathodes inside ...
The Predicta Tandem model had a fully detached picture tube and an umbilical cable, which allowed the controls and speaker for the set to be next to the viewer, with the screen up to 25 feet away. Also unique to this version was a large handle over the top to carry the cathode ray tube portion wherever the viewer wanted it. This version also ...
The Chromatron is a color television cathode ray tube design invented by Nobel prize-winner Ernest Lawrence and developed commercially by Paramount Pictures, Sony, Litton Industries and others. The Chromatron offered brighter images than conventional color television systems using a shadow mask, but a host of development problems kept it from ...
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The "Braun tube" became the foundation of 20th century TV. [10] In 1926, Kenjiro Takayanagi demonstrated the first TV system that employed a cathode-ray tube (CRT) display, at Hamamatsu Industrial High School in Japan. [11] This was the first working example of a fully electronic television receiver. [12]
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