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LED Backlight
Light Emitting Diode, or LED, backlight is the most
popular backlighting for small and medium LCDs.
The advantages of LED backlighting are its low cost,
long life, immunity to vibration, low operational
voltage, and precise control over its intensity. The
main drawback is it does require more power that most of
the other methods, and this is a major drawback if the
LCD size is large enough. LED backlights come in a
variety of colors, with yellow-green being the most
common, and now white is becoming cost effective and
very popular. LED backlights offer a longer operating
life - 50,000 hours minimum - and are brighter than
ELPs. Being a solid state device, they are configured to
operate with typically a +5VDC power (and optionally
12VDC power), so they do not require an inverter. The
LED backlight has two basic configurations; Array and
edge lit. In both types the LEDs are the light
source that are focused into a diffuser that distributes
the light evenly behind the viewing area. In Array lit
configuration there are many LEDs mounted uniformly
behind the display, it offers more uniform and brighter
lighting and consumes more power. In Edge lit
configuration, the LEDs are mounted to on side
(typically the top) focused edge on into the diffuser,
it offers a thinner package and consumes less power.
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Office
in North America
Orient Display (North America) Limited
145 Royal Crest Court, Unit 42,
Markham, Ontario, Canada
L3R 9Z4
Tel: (905) 477-1166
Fax: (905) 477-1782
Email: services@orientdisplay.com
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