Archived posting to the Leica Users Group, 2011/09/04

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Subject: [Leica] IMG: A Different Kind of Bee
From: hlritter at bex.net (Howard Ritter)
Date: Sun, 4 Sep 2011 17:34:00 -0400
References: <CA89581B.14251%mark@rabinergroup.com>

Actually, it's both. The "LED" only refers to the new method of backlighting 
the conventional image-forming LCD panel.

The advance over previous LCD screens is that they used cold fluorescent 
lamps that provided constant illumination, whereas the LED array is made up 
of a large number of emitters whose intensity can be modulated to allow for 
a better dynamic range in brightness. What's important about this is the 
fact that LCD pixels cannot quite get opaque, so its dark areas cannot get 
quite black, whereas a dark area in an image on an "LED screen" can have its 
LED backlight turned off to produce true black. The new generation of "LED" 
televisions uses this design too.

Pure-LED screens, where each colored pixel actually generates the emitted 
light, are supposed to be the holy grail for TV, smartphone, pad, and 
computer screens. They're in some cameras, but aren't available in computers 
or TVs yet except in a few TVs and monitors that feature organic LED (OLED) 
screens. They're said to produce magnificent images. Sony's OLED TVs are as 
awesome in price as in performance (17", $3690 at B&H!), and lots of folks 
are wondering why this particular technology isn't coming down in price so 
that it can be used in computers at reasonable prices and TVs at 
contemporary jumbo sizes and competitive prices.

?howard


On Sep 4, 2011, at 4:30 PM, Mark Rabiner wrote:

> My macbook pro monitor is LED based not LCD. That could be it.
> -- 
> Mark R.
> http://gallery.leica-users.org/v/lugalrabs/


In reply to: Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] IMG: A Different Kind of Bee)