Along with the PureMotion HD+ technology that improves screen refresh rate and resolution in the upcoming Nokia Lumia 920 devices, Nokia has also improved its ClearBlack Display technology. Nokia’s CBD improved screen visibility by reducing reflections when it is sunny outside and not its has been further improved with Lumia 920.
Nokia explains the improvements as below,
First is the high brightness mode, which increases the luminance of the screen by 20 per cent in sunlight conditions. This improvement has been achieved with a better understanding of how LEDs work and being able to maximise their potential.
Despite the low reflectance and high brightness display, overcoming the powerful display hazing effect of the sun is not an easy task and leaves room for further improvement. The next innovation therefore is the sunlight readability enhancement algorithm, which is able to tune the display content on the fly so that the details are much clearer and crisper even in direct sunlight.
The high brightness mode producing 20 per cent more brightness also consumes 20 per cent more power, but the ambient sensor will adjust the display to the optimal brightness setting to have lower power consumption.
Read more about it here.