I haven't looked at the following idea in detail but I would suggest seeing if you can bolster the back screen lamp on an LCD panel to increase the light output. e.g. tandem lamps instead of a single unit to increase outdoor readability. The idea stems from people dismantling LCD's & putting them on overhead projectors to get a cheap equivalent of a conventional XGA projector.

This could be a silly idea, but couldn't you just use sunlight? The colors wouldn't be reproduced accurately but the image will still be visible.

You would save most of the power used by the LCD.

What I'm thinking about is a tube or some other device to direct sunlight to the back of the lcd panel. The panel itself would be removed from the enclosure of course.


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