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Because a sunny day at the equator is about a kilowatt per square metre. A typical mobile phone display is about 100 cm^2 (0.01 m^2), so you would need to emit
by kwhitefoot 2y ago
Because a sunny day at the equator is about a kilowatt per square metre. A typical mobile phone display is about 100 cm^2 (0.01 m^2), so you would need to emit 10 watts to match sunlight.
As far as I can tell OLEDs are 20% efficient or less so you would need an input power of 50 W. Even at 60 deg. N where I live we get over 300 W/m^2 in August so would still need about 15 W of input power to the display.
- WithinReason 2y agoJust aim the light at the user's face and those power requirements reduce by 99% :)
- kwhitefoot 2y agoHow so? Diffuse and reflected sunlight is still orders of magnitude brighter than you can feasibly generate in a mobile phone. Perhaps the solution is eye tracking and steerable lasers lighting up the retina directly. That should cut the power requirements by a factor of a few thousand!