Quote:
Originally Posted by salamanderjuice
Because a front light by it's very nature works differently from a back light? A back light is basically shining light straight at you. A front light is shining light across the screen like a lamp behind you. One has the source of the light shining directly into your eyes, the other is reflected light. It's not quite the same. You're probably OKAY to look at stuff lit by a 100W light bulb in a small room, looking at even a 40W light bulb directly is a different story. Also since the eInk screen can reflect ambient light as well it doesn't need to be cranked as high to appear as bright as an LCD in the same room.
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It's really not different. You're talking about light intensity and yes, looking at a 40W bulb can be uncomfortable because it's essentially a point source of light. Spread that same amount of light out over a larger area, and it's no longer uncomfortable to look at, because the light intensity per unit area is lower.
There's no reason to have an LCD screen emitting more light than the frontlight of an eInk reader does, and if both are set to emit the same amount of light, they will be equally comfortable to use.
As I said at the start of this thread, the problem is that many people have LCD backlights set far too high.