40 percent less power needed with Limited-color OLEDs

Researchers of Simon Fraser University in British Columbia, Canada have shown that OLEDs can be made even more frugal by carefully choosing the balance of colours used to make up an image.

One is based on a set of discrete user-named (categorical) colors, which are analyzed according to their energy consumption. The second is based on the constrained continuous optimization of color energy in the perceptually uniform CIELAB color space. The researchers quantitatively compare the two approaches with a traditional choice of colors, demonstrating that we typically save approximately 40 percent of the energy. The color sets are applied to examples from the 2D visualization of nominal data and volume rendering of 3D scalar fields.

The new colour palette could help the designers of mobile devices like cellphones extend their battery life.

Here you see a map of the US rendered using both normal colours, lower half, and colours that require up to 40 per cent less energy when shown on an OLED display, upper half

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