[alok-g]

While you are correct, there is another aspect to power in displays:

The most important component of LCD power is the back light that illuminates the display from behind. The overall transmission of LCD is only about 5% or so, which means that the back light behind is as much as twenty times brighter than what the user sees.

Increasing the pixel density implies that the pixels are smaller. Which means that the circuitry takes a larger fraction of the pixel [1]. Which means that more of the light is blocked. Which means that the back light now needs to be still brighter to compensate. As a result, iPad 3 back light uses 2.5 times more power than iPad 2 back light [2].

I am interested in knowing more about the logic and interface power in the way you have described. Please let me know if it is possible to get in touch.

[1] http://www.extremetech.com/computing/122725-what-the-ipad-3s...

[2] http://www.displaymate.com/iPad_ShootOut_1.htm

[algoshift]

You are right, of course, however, I have built quite elaborate LED-based backlight systems and have metrics on this too. A few years ago we did a custom system with a 1,000 Watt (yes, one thousand) custom liquid-cooled RGB LED backlight. Performance depends on many things, from aperture ratios to the spectral transmission characteristics of the filters as well as how they match the emission spectra of the backlight elements.

With regards to getting in touch, email me at martin_05 the domain is rocketmail and TLD is .com