The Use Of Ultraviolet Rays - Sony LUMA Product Information Manual

The use of Ultraviolet rays

In CRTs, the R, G, and B phosphors emit light by
the physical impact of the electronic beam hitting
the phosphors. The phosphors convert the
physical energy of the electrons to a different
energy, known to us as light.
Plasma displays also use phosphor material to
emit light, but in a different manner.
Each tiny cell in a plasma display is coated along
the inside with a phosphor material, which
produces either red, green, or blue light when
stimulated.
An important fact to note is that when exposed to
ultraviolet rays (invisible light), phosphor material
converts (the energy of) these rays to viewable
light (visible light). The color of the visible light
produced is governed by the type of phosphor
material used. This energy conversion - from
Xenon gas
Phosphor
Figure 2-10. The red, green and blue cells of a plasma display
The basic mechanisms of display devices
ultraviolet rays (invisible) to visible light - is the
central mechanism enabling the cells of a Plasma
display to produce color images.
In reality, ultraviolet rays are produced in Plasma
display cells by discharging a gas (usually xenon
gas) concealed within each cell. Each cell is
sandwiched by several electrodes, positioned on
the top and bottom of the cell, to carry out this role.
When voltage is applied to these electrodes in the
appropriate sequence, a current starts running
through the gas, discharging it (see Figure 2-10),
which in turn produces ultraviolet waves. The
phosphor material coated within the cell is then
exposed to these ultraviolet rays, producing R, G,
or B light according to the phosphor type.
Light
Xenon gas Xenon gas
Phosphor Phosphor
Product Information Manual Sony Professional LCD Monitor
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