Hi-res tablet display saves energy by using fewer pixels

Samsung and Nouvoyance create a hi-res tablet display that saves energy by using larger pixels

Samsung and Nouvoyance are working some tablet witchcraft to create a display that saves on three-quarters of energy consumption while providing a more dynamic color palate. We've already looked at this PenTile WQXGA display, which promises a 2560 by 1600 resolution, but let's take a closer look at the tech.

While most displays cram in more pixels for higher resolution, the PenTile display actually uses larger subpixels--the bits that compose the RGB stripe of a LCD--and even uses one pixel that is completely clear. The design allows the backlight to shine more light through. It also enables the larger sub-pixels to be more effective since fewer transistors are needed to power the display.

In a typical display, the RGB stripe design of a display panel is inefficient because the density of the pixels blocks the backlight like a curtain. Regular displays also needs more transistors to power a megapixel display; but the transistors also block part of the pixels as well.

You might think an LCD driven by larger subpixels, with one-out-of-every-four being completely clear, must have a resolution in the only hundreds of pixels. But PenTile looks like it has a 1600 resolution; it achieves this effect by employing a trick of using individual subpixels.

Another way the PenTile display saves energy is by not lighting up part of the screen at all. It uses image-processing algorithms to determine the brightness of a scene, and removes backlight where it is not needed. The display, in turn, saves energy and can create higher contrast images.

[Nouvoyance via Technology Review ]

Like this? you might also enjoy...

Get your GeekTech on: Twitter - Facebook - RSS | Tip us off

This story, "Hi-res tablet display saves energy by using fewer pixels" was originally published by PCWorld.

Top 10 Hot Internet of Things Startups
Join the discussion
Be the first to comment on this article. Our Commenting Policies