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CRTs, or cathode ray tube TVs, are pretty much regular
television sets that use a series of tubes inside the TV to
generate images on the screen. Modern TVs have evolved from
CRTs, with the introduction of LCD and Plasma flat screen TVs
that are gaining popularity in the global markets. When people
talk about home theater systems today, they almost always refer
to an LCD or Plasma TV as the centerpiece for the room. However,
high defenition CRTs actually offer certain advantages over
their "modern" cousins, and you should consider these
differences before writing off CRTs as an option.
Heat Management - all electronic equipment generates heat when
it operates. CRTs are on the "medium" end of this scale, with
LCDs creating the least internal heat and Plasmas the most.
However, CRTs are the LEAST sensitive to heat exposure, meaning
in temperate climates, LCDs and especially plasma screens will
deteriorate faster than a CRT.
Light Refraction - LCDs and Plasma TVs are flat screens because
their method of displaying images uses small machines inside the
pixels of the actual TV screen, whereas a CRT uses a bulkier
device inside the TV to project the image onto the screen. This
makes CRTs much less sensitive to changes in lighting inside a
room. LCDs, for example, can't display the color "black"
effectively due to the fact that it's LCDs block and filter
light to generate an image. Plasmas, on the other hand, generate
light within each pixel, so light from outside sources reflect
more off a plasma screen than a CRT. Overall, this makes CRTs
more stable in terms of their display quality.
Unit Screen Size - As far as screen size is concerned, CRTs and
LCDs aren't quite as large as Plasma TVs. Plasma screen
technology allows for the creation of larger screens by far than
either LCDs or CRTs. Additionally, CRTs are bulky compared to
the other two flatscreen TV types so this is one area where CRTs
lose out.
Tube Lifespan - CRT TVs are on the medium end of the spectrum
here. Plasma screen TVs have the longest lifespan before the
displays burn out, and LCD TVs degrade the fastest. However, due
to the high heat generated by plasma screens, they can actually
die out as quickly as an LCD screen in hotter climates and with
prolonged use. The main lifespan advantage of a CRT over
flatscreens is that it's lifespan doesn't severely shorten if
the unit is used frequently and repeatedly. It's the perfect
movie marathon device.
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