LCDs are already incredibly energy efficient compared to CRTs. OLEDs hold even more promise, but aside from some small gadgets, the technology is still out of reach.

TreeHugger has an item on yet another technology from Woodlands, TX startup Unipixel that blends the tried-and-true with some clever ways of producing an image.

Unipixel uses a technique known as frustrated total internal reflection (FTIR) to bend incoming light toward the viewer, producing an image. While most liquid-crystal display technologies consist of 3 subpixels - red, green and blue - that cooperate to create a range of colors, Unipixel's display instead relies on red, green and blue LEDs placed at the edge of screen. Because they flash at such a rapid clip, the viewer perceives a range of colors as extensive as that found in liquid-crystal displays.

The company claims that panels made in this fashion are 60 percent more efficient. Click the TreeHugger post for more details. Unipixel goes into more technical depth here.