Transparent Conductors Are Never Completely Transparent

A grating is a more precise version of the rough surface that typically spreads light across the light-guide behind the liquid crystal panel in a display. If we could switch gratings on and off, we could control where the panel is illuminated and who gets to see the picture. But how do you switch a…


Switchable Gratings

Replace the LEDs in a conventional backlight with lasers and replace its randomly rough surface by a grating and it will produce collimated illumination. The angle of collimated illumination depends on the angle of the lasers so we have a low power backlight which can target rays towards a user as they move around, provided…


Eliminating Wasted Light

It’s easy to forget that when we look at a display, we see an image because rays of light travel from the screen to our eye. All other rays are wasted and we want to save power by making displays which concentrate their emission into the viewers’ eyes but how do you do that? It…

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On Decreasing Power Consumption of Displays

Given our remit to improve the human-computer interface, we spend a lot of time thinking about displays. Modern displays are pretty good – thin, high resolution and so on – but they use a lot of power. Indeed, in a typical liquid crystal display, less than 6% of rays from the backlight get though the…


Welcome!

Welcome to the Applied Sciences Group Blog! The Applied Sciences Group (ASG) is an applied research and development team dedicated to creating the next generation of computer interaction technologies. We focus on the synergy between optics, electronics and software to create novel human computer interfaces. ASG is part of the Entertainment and Devices Division at…

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