have you been in the market for a new TV lately if so you've probably noticed
that the TV manufacturers and big box stores use a number of tricks to lure
you in they mostly Focus their advertising on the same stuff High
resolutions huge screen sizes and rock
bottom prices all designed to convince you to
punch and elbow your way past a bunch of strangers on Black Friday like some sort
of electronics piranha but there's a
crucial often ignored element one that
is arguably the biggest determinant of
overall picture quality contrast
ratio but what the heck is that well
although it's not something that's always easy to find if you're buying a
TV or a monitor Off the Shelf at a brick and mortar store you should have
encountered contrast ratio at some point on a spec page if you're shopping online
but what do those values 1,000 to 1 1
million to one even mean well you see
contrast ratio is essentially the difference between the brightest white
that a screen can produce and the darkest black which is very important
because having the correct brightness on different areas on screen is critical
for making dark areas look sufficiently dark without losing detail and for
optimal visibility in bright areas think of a shot of a city at night a TV with
good contrast will clearly show you a
dark night sky while making the detail of the city lights stand out if your
screen contrast ratio is too low the
entire scene will be less detailed and more washed out with dull stars on a
charcoal backdrop typically modern IPS displays
as as well as better-made TN panels will
offer contrast ratios in the neighborhood of a th000 to1 meaning the
brightest pixel will be a thousand times brighter than the dimmest if you opt for
a more unusual VA type display you'll
generally see better performance at least by this particular metric with
contrast ratios between 2 and 5,000 to
one but what about those spec sheets you
see that advertise insane contrast ratios of like 10 million to one well if
you look closely you'll see that these
numbers indicate a dynamic contrast
ratio which is a number that a manufacturer claims a display can
achieve with backlight trickery so on
lower end sets the entire backlight will be turned up or down depending on the
brightness of the scene while on high-end ones this is done more GR
granularly with certain parts of the scene being boosted or dimmed these
dimming techniques are quite useful and can result in better picture quality but
the experience definitely isn't the same as having a panel that can achieve
natively an absurdly high contrast ratio
like an OLED one whose pixels individually emit their own light
without any backlight allowing them to perform this dimming functionality on a
per pixel level they can even be turned
off so long story short then unless
we're talking about OLED you should take those 10 million to one numbers with a
huge grain of salt and for that matter
even oleds that might really have 10
million to one contrast ratios are sometimes advertised as having infinite
contrast that should really be undefined
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