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Phosphors

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phosphors:
Tiny red, green, and blue grains on the inside surface of a CRT monitor that are illuminated when an electron beam is directed toward them.
PhotoCD: ...

 


A monitor, that a photographer uses to view an image while editing, creates color by exciting phosphors (generally three different phosphors) on the screen that then emit their own light or by sending light through colored filters.

monitors because phosphors lose brightness over time, and on printers because proofers and other digital printing devices can change output when colorant or paper stock is changed. Calibration is not required for most input devices (e.g.

Older monitors will have a harder time than newer ones since their phosphors are starting to wear out. With today's technology, a CRT monitor has a wider gamut than an LCD one does.

This is because phosphors used in monitors are non-linear and make darker colors appear less dark and lighter colors extra bright. To prevent this the signal is electronically adjusted to counteract this effect.

The inner surface of the CRT is coated with phosphors, which glow and produce light when hit by an electron beam.

Previewing an image at 50% magnification is an imprecise, but practical way of compensating for the differences in between display (so many phosphors or diodes per inch) and printer (so many dots per inch, 2880 for Epson printers).

(1) on a monitor, the combination of all three red, green, and blue phosphors at full intensity as measured by its color temperature in Kelvin, a necessary reference point in calibration and characterization; (2) scanned color that produces 255,255, ...

The Red Eye Method practically eliminates the ghosting caused by the slow decay of the green and blue P22-type phosphors typically used in conventional CRT monitors.

The rate at which an image is redrawn on a CRT. This is needed because the phosphors at each pixel are stimulated by the electron gun for only a brief time. The faster the refresh rate, the more stable an image will appear on the screen.

The chemical substance on the inside face of a computer screen that illuminates when electrically charged. The colour accuracy and luminance values of phosphors change over time, ...

Overlapping these colours in varying strengths creates cyan, yellow and magenta while equal proportions creates white. Computer monitors create accurate colour by firing light through red green and blue phosphors while digital cameras and scanners ...

See also: Monitor, Camera, Light, Image, Print

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