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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.
Yttrium is one of the elements that was used to make the red color in CRT televisions. The red component of color television cathode ray tubes is typically emitted from an yttria (Y 2 O 3) or yttrium oxide sulfide (Y 2 O 2 S) host lattice doped with europium (III) cation (Eu 3+) phosphors.
The Geer tube was an early single-tube color television cathode ray tube, developed by Willard Geer. The Geer tube used a pattern of small phosphor-covered three-sided pyramids on the inside of the CRT faceplate to mix separate red, green, and blue signals from three electron guns .
Electron gun from an oscilloscope CRT Setup of an electron gun. 1. Hot cathode.2. Wehnelt cylinder.3. Anode. A direct current, electrostatic thermionic electron gun is formed from several parts: a hot cathode, which is heated to create a stream of electrons via thermionic emission; electrodes generating an electric field to focus the electron beam (such as a Wehnelt cylinder); and one or more ...
The television is a Montgomery Ward Airline 84GSE3011A (made by Sentinel Radio and Television Corp.) From 1946 to 1951 the 7JP4 was a common CRT (picture tube, or kinescope) used in lower priced televisions sold in the United States. These television were popular for portable carry around and small table top sets.
Each element of the card was designed to measure a specific technical aspect of television broadcast so that an experienced engineer could, at a glance, identify problems. The card contains elements used to measure aspect ratio, [a] perspective, framing, linearity, frequency response, differential gain, contrast, and brightness. The grid and ...
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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 ...