21 Facts About CRT monitor

The earliest version of the CRT monitor was known as the "Braun tube", invented by the German physicist Ferdinand Braun in 1897.

CRT monitor expanded on his vision in a speech given in London in 1911 and reported in The Times and the Journal of the Rontgen Society.

In 2015, several CRT monitor manufacturers were convicted in the US for price fixing.

CRT monitor glass used to be made by dedicated companies such as AGC Inc, O-I Glass, Samsung Corning Precision Materials, Corning Inc, and Nippon Electric Glass; others such as Videocon, Sony for the US market and Thomson made their own glass.

The amount of x-rays emitted by a CRT monitor can lowered by reducing the brightness of the image.

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The lead in the glass causes it to brown with use due to x-rays, usually the CRT monitor cathode wears out due to cathode poisoning before browning becomes apparent.

Design of the high voltage power supply in a product using a CRT monitor has an influence in the amount of x-rays emitted by the CRT monitor.

One of the ends of the electron gun has a glass disk, the edges of which are fused with the edge of the neck of the CRT monitor, possibly using frit; the metal leads that connect the electron gun to the outside pass through the disk.

The stage contains a capacitor that is in series with the horizontal deflection coils that performs several functions, among them are: shaping the sawtooth deflection signal to match the curvature of the CRT monitor and centering the image by preventing a DC bias from developing on the coil.

Burn-in is when images are physically "burned" into the screen of the CRT monitor; this occurs due to degradation of the phosphors due to prolonged electron bombardment of the phosphors, and happens when a fixed image or logo is left for too long on the screen, causing it to appear as a "ghost" image or, in severe cases, when the CRT monitor is off.

The heating and cooling are done gradually to avoid inducing stress, stiffening and possibly cracking the glass; the oven heats the gases inside the CRT monitor, increasing the speed of the gas molecules which increases the chances of them getting drawn out by the vacuum pump.

The getter material which is often barium-based, catches any remaining gas particles as it evaporates due to heating induced by the RF coil ; the vapor fills the CRT monitor, trapping any gas molecules that it encounters and condenses on the inside of the CRT monitor forming a layer that contains trapped gas molecules.

Early red and green phosphors contained Cadmium, and some black and white CRT monitor phosphors contained beryllium powder, although white phosphors containing cadmium, zinc and magnesium with silver, copper or manganese as dopants were used.

The CRT monitor is then baked in an oven in what is called a Lehr bake, to cure the frit, sealing the funnel and screen together.

Convergence and purity are distinct parameters; a CRT monitor could have good purity but poor convergence, or vice versa.

Each CRT monitor has its own glycol, which has access to an air bubble to allow the glycol to shrink and expand as it cools and warms.

Slimmer CRT monitor had the trade names Superslim, Ultraslim, Vixlim and Cybertube and Cybertube+ .

Density of the x-rays that would be generated by a CRT monitor is low because the raster scan of a typical CRT monitor distributes the energy of the electron beam across the entire screen.

Under some circumstances, the signal radiated from the electron guns, scanning circuitry, and associated wiring of a CRT monitor can be captured remotely and used to reconstruct what is shown on the CRT monitor using a process called Van Eck phreaking.

Funnel can be separated from the screen of the CRT monitor using laser cutting, diamond saws or wires or using a resistively heated nichrome wire.

Considerable portion of CRT monitor glass is landfilled, where it can pollute the surrounding environment.