Hd tube

Duration: 12min 27sec Views: 692 Submitted: 03.07.2020
Category: School
Tags: hd+tube
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EK-HD Tube 12/16mm 3-Slot (2 pcs)

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The cathode-ray tube CRT is a vacuum tube that contains one or more electron guns and a phosphorescent screen, and is used to display images. The images may represent electrical waveforms oscilloscope , pictures television , computer monitor , radar targets, or other phenomena. CRTs have also been used as memory devices , in which case the visible light emitted from the fluorescent material if any is not intended to have significant meaning to a visual observer though the visible pattern on the tube face may cryptically represent the stored data. In television sets and computer monitors, the entire front area of the tube is scanned repetitively and systematically in a fixed pattern called a raster. In color devices, an image is produced by controlling the intensity of each of the three electron beams , one for each additive primary color red, green, and blue with a video signal as a reference.
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