Originally Posted by spinee
but doesn't the NST have LED lights on all the time anyway? i was under the impression that the "touch" was implemented via a grid of LED lights just above screen level, which will be on as long as you are reading (they turn off when the screen saver comes on).
i won't even hazard a guess as to how much power the infrared LEDs drain compared to the glowlight LEDs, but the existing lights don't seem to cost all that much power.
The ir emitters can use A LOT less power, like orders of magnitude less, as they only need to be detectable to a sensor a few inches away, as opposed to having to be not only detectable, but comfortable, to a human eye several feet away, after being reflected off another surface.
But for the sake of discussion, even if we assume that they used exactly the SAME power as the glow light, then now we are talking about DOUBLING the consumption.