That is, the blue electron gun will strike blue phosphors, but will find a wire blocks the path to red and green phosphors.

When a color TV needs to create a red dot, it fires the red beam at the red phosphor.

Each stream travels through a shadow mask where the electrons will impinge upon either a red, green or blue phosphor to light up a color pixel on the screen.

Instead, the screen is coated with red, green and blue phosphors arranged in dots or stripes.

Red: Yttrium oxide-sulfide activated with europium is used as the red phosphor in color CRTs.

The development of color TVs took a long time due to the long search for a red phosphor.

It is widely used as a red or blue phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors.

In addition to the gas, each cell is coated with a red, blue or green phosphor.

Europium-doped yttrium vanadate was the first red phosphor to enable the development of color television screens.

The earliest color television CRTs had a poor-quality red; europium as a phosphor dopant made good red phosphors possible.