[Q] MagicWhite technology's magic potential? - Sony Xperia P, U, Sola, Go

XP owners have the brightest screen on the market (867 cd/m²).
Other phones are nowhere near this (Iphone4s 485, onex 450, sii 256, gnex 135) and all this is, thanks to the MagicWhite technology. But XP is criticized for it's poor blacks.
I don't have detailed knowledge about what i'm going to yammer about. But stick with me, it might become interesting.
With LED backlit screens, it is theoretically possible to have very high contrast ratios. Cause unlike CCFL screens you have a white LED behind each pixel and if the hardware design allows you to get a reference to each backlight LED, you should be able to control the backlight for each pixel and have them turned off behind black pixels and maximize their brightness behind the white ones. something like what you get with SuperAMOLED screens.
Pros probably answer that we don't have access to each subpixel on the backlight panel. But with WhiteMagic it has to be different. cause it's not just a panel of LEDs all of which have to have the same amount of brightness. It's a fourth subpixel in the main panel if i'm not misunderstood by Sony saying "WhiteMagic adds a 4th white sub-pixel – traditional LCD screens have three; red, green and blue – to the Reality Display."
So?
So we must be able to have great blacks. It seems to me when i maximize my brightness, that blacks also get a lot brighter. When the fourth white subpixel must be used only for making pixels brighter considering the amount of brightness they already have.
This is probably a modification in the kernel layer.
Pictures might make it more interesting for noobs like me:
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You can see that backlight layer here doesn't have a static brightness per pixel. There are four masks being presented to the screen here: Red layer, green layer, blue layer and last but not least the white layer. Although this just demonstrates what i said about any LED backlit display. There's a lot more than this to our MagicWhite display.
p.s sorry if my english doesn't feel english.

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Poor blacks on any LCD is the result of light passing trough crystals. In addition to that Sony opened another hole for light to pass, so maybe that is a reason why you have poor blacks.

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ljubanve said:
Poor blacks on any LCD is the result of light passing trough crystals. In addition to that Sony opened another hole for light to pass, so maybe that is a reason why you have poor blacks.
Click to expand...
Click to collapse
partialy true. there are multiple reasons we're not getting a black black.
there is this gap between the glass and the lcd panel that causes reflection. this is solved in xperia z.
there could be other polarizing layers to reduce reflection. like what we have in Nokia's Clear Black LCD Displays. they offer blacks like sAMOLED blacks.
but that is all hardware stuff and there's nothing we can do about it.
i'm talking about what could probably be done with the hardware that is already in our hands.

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Correction !!!
There wont be each white LED behind each pixel in LED backlit LCD's , for whole LCD there will be 8 ,9 .... White LED's.
to understand clearly look at this edge LED's in LCD
http://upload.wikimedia.org/wikiped...cklight.JPG/800px-IPod_Touch_2G_Backlight.JPG
but in Xperia p LCD WhiteMagic there is a fourth subpixel in the main panel . because of this the white dominates the whole and decreases the contrast whereas in ordinary Backlit LED LCD the white LED's is behind LCD panel , i think
for more info http://en.wikipedia.org/wiki/LED-backlit_LCD_display

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shuhail said:
Correction !!!
There wont be each white LED behind each pixel in LED backlit LCD's , for whole LCD there will be 8 ,9 .... White LED's.
to understand clearly look at this edge LED's in LCD
http://upload.wikimedia.org/wikiped...cklight.JPG/800px-IPod_Touch_2G_Backlight.JPG
but in Xperia p LCD WhiteMagic there is a fourth subpixel in the main panel . because of this the white dominates the whole and decreases the contrast whereas in ordinary Backlit LED LCD the white LED's is behind LCD panel , i think
for more info http://en.wikipedia.org/wiki/LED-backlit_LCD_display
Click to expand...
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Objection !!!
Wikipedia said:
Three types of LED may be used:
- White-edge LEDs around the rim of the screen, using a special diffusion panel to spread the light evenly behind the screen (the most common use)
- LED array behind the screen, whose brightness is not controlled individually
- Dynamic “local dimming” array of LEDs, controlled individually (or in clusters) to achieve a modulated backlight pattern
Click to expand...
Click to collapse
and you are talking only about the first type.

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And none of them have LED for each pixel.
http://developer.sonymobile.com/2012/02/27/introducing-whitemagic-the-technology-in-xperia-p/

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safir187 said:
Objection !!!
and you are talking only about the first type.
Click to expand...
Click to collapse
Talking about all 3

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ok it's not an led per pixel but it's not 8 or 9 leds in all three types.
anyway, f*&$ backlit led screens! i didn't say LED Backlit's LED potential, i said MagicWhite technology's magic potential, and i guess we all agree that there's a white subpixel per pixel in this type of display.
so let's not be off topic. i just think the blacks shouldn't be this bright with the brightness maximized if it's a result of that fourth subpixel.