On Thu, May 21, 2009 at 9:12 AM, zogg <[email protected]> wrote: > Looks like LCD for indoors are common, and for outdoors theres scarcity. > So, do you know any manufacturers, or at least in what direction should > i try and look at?
The OLPC has an LCD which is very easy to read in daylight. When backlit, it appears as a color LCD, but when frontlit (as from the sun), it appears greyscale. This is a function of the OLPC's very efficient backlight system (instead of using colored filters to block out 66% of the light from the white backlight for each pixel, they use a fresnel prism to split the backlight into it's component wavelengths on pixel boundaries. Thereby allowing nearly 100% of the light produced by the backlight through to your eyes, as opposed to less than 33% for typical LCDs. Light from the front of the LCD passes through the pixels, and is reflected by a silvered layer, back through the pixels to your eyes, never passing through the prism, so what would normally be colored sub-pixels appear as greyscale pixels. --tim _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
