Solution to LED notifications

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While browsing this, I discovered a possible solution to replace LED notifications. I believe a little more than 9 pixels would be fine however, maybe it pongs around the screen like a screensaver.

The good thing about AMOLED screens is that when a pixels display a true black color (#000000) it's actually completely turned off that pixel, in fact displaying true 480x800 black image on the SGS screen resemble turning the screen off. so i was thinking what if the screen was completely black except for few pixels in the coroner that are green to indicate miss calls, the screen will only consume power to keep these few pixels on, the rest of pixels will not consume any power.

To demo this, i made this 480x800 image with all pixels black except for 9 green pixels on the top left corner, you can save it and try it in your SGS full screen, as for the power consumption, the screen have a total of 480x800=384000 pixels, of which only 9 is on, so 9/384000=0.002% of the screen power only consumed to keep these 9 pixels on.

brilliant! thats so smart, how do you set this to show up tho? is there a setting for this? or would it require mods?

Sounds great but I guess it'll require mods.
But he's wrong when saying "black is like display off" since there's still the backlight which uses battery

Edit // or am I wrong? http://forum.xda-developers.com/showthread.php?t=706640

I think u r wrong. .. I remember. Reading that old have no backlight. That is why they save power over conventional displays.

AMOLED doesn't have a back light.

It has True blacks. I.E. when displaying the black color, it just doesn't turn on.

LCD's, to be visible, need a backlight/sidelight.

Yea but in that case would'nt it need a back light to illuminate the 9 bright pixels??

OLED displays are made up of tiny organic LEDs (light-emitting diodes), so each subpixel emits its own light - the display is black when they're off. Different amounts of light emitted from the different colour subpixels gives a pixel with an overall colour. So if only 9 pixels are lit, only those 9 pixels are consuming power. This also means that brighter and whiter images use more power.

This is in contrast to a LCD, where there's a backlight that makes the entire display white when all the subpixels are off. Liquid crystal subpixels block the light to varying degrees in order to produce the image; each subpixel has a red, green or blue filter to produce colour. Therefore the image is subtractive from a white background. The power consumption doesn't really vary depending on the image being displayed, because the backlight is always on over the whole screen.

However, I don't know if the CPU would be able to sleep with the display "on", even if the display itself isn't consuming much power.

Nope. Only the nine pixels will be switched on. No backlight involved.

Originally Posted by Mithent

However, I don't know if the CPU would be able to sleep with the display "on", even if the display itself isn't consuming much power.

Hmmmm good point. Maybe in slo-mo power saving mode ;p

I prefer if the menu and back buttons would flash