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US 7138755B2, "Color photograph tube apparatus getting beam velocity modulation coils overlapping with convergence and purity device and ring formed ferrite core" ^Droit d'auteur : les textes sont disponibles sous licence Creative Commons attribution, partage dans les mêmes disorders ; d’autres conditions peuvent s’appliquer. Voyez les conditions d’utilisation pour furthermore de détails, ainsi que les crédits graphiques.
CN 1400621A, "Digital tube cathode, lengthy-life electronic tube tube and its earning approach" ^ a b c d
For example, his husband or wife wakes up before than him on a regular basis, normally arranges almost everything for him, just to ensure he is up and running The complete working day.
Mostly Employed in oscilloscopes. Deflection is completed by implementing a voltage throughout two pairs of plates, just one for horizontal, and another for vertical deflection. The electron beam is steered by different the voltage big difference across plates in a pair; Such as, making use of a voltage of 200 volts to your higher plate on the vertical deflection pair, whilst keeping the voltage in The underside plate at 0 volts, will induce the electron beam to generally be deflected in direction of the upper A part of the display screen; growing the voltage inside the upper plate when retaining The underside plate at 0 will cause the electron beam to generally be deflected to a better place inside the screen (will lead to the beam to become deflected at a higher deflection angle).
The outer conductive coating is connected to ground even though the interior conductive coating is connected using the anode button/cap through a series of capacitors and diodes (a Cockcroft–Walton generator) into the superior voltage flyback transformer; the inner coating will be the anode of the CRT,[233] which together with an electrode within the electron gun, is also called the ultimate anode.
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When exhibiting rapid one-shot events, the electron beam must deflect in a short time, with number of electrons impinging about the screen, bringing about a faint or invisible picture around the Display screen. Oscilloscope CRTs made for very speedy indicators can give a brighter Exhibit by passing the electron beam through a micro-channel plate just before it reaches the display screen.
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The United States Environmental Protection Company (EPA) includes discarded CRT displays in its group of "hazardous household squander"[571] but considers CRTs which have been put aside for screening for being commodities if they are not discarded, speculatively amassed, or still left unprotected from weather along with other damage.[572]
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For the duration of retracing in the electron beam, the preamplifier that feeds the video clip amplifier is disabled plus the video clip amplifier is biased to a voltage higher than the cutoff voltage to stop retrace strains from exhibiting, or G1 may have a substantial damaging voltage placed on it to avoid electrons from obtaining out of the cathode.[23] This is referred to as blanking. (see Vertical blanking interval and Horizontal blanking interval.) Incorrect biasing can result in obvious retrace lines on a number of colors, developing retrace lines which have been tinted or white (by way of example, tinted red if the purple coloration is impacted, tinted magenta In linked here case the pink and blue colors are affected, and white if all colours are influenced).
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On some CRTs, additional fixed adjustable magnets are additional for dynamic convergence or dynamic purity at specific details to the monitor, ordinarily close to the corners or edges. Further adjustment of dynamic convergence and purity typically can not be finished passively, but necessitates Lively compensation circuits, a single to appropriate convergence horizontally and Yet another to appropriate it vertically. The deflection yoke includes convergence coils, a list of two for every shade, wound on the exact same core, to which the convergence signals are used. Which means six convergence coils in groups of three, with 2 coils per team, with a single coil for horizontal convergence correction and One more for vertical convergence correction, with Each and every team sharing a core. The teams are separated a hundred and twenty° from one another. Dynamic convergence is necessary since the front with the CRT as well as the shadow mask aren't spherical, compensating for electron beam defocusing and astigmatism. The reality that the CRT screen just isn't spherical[466] results in geometry problems which may be corrected employing a circuit.