3D Printing Of LED Display Contact Lenses
University of Washington researchers have used a 3D quantum dot LED printer to fabricate a contact lens with built-in information displays.
(3D printed LED contact lens)
By breaking the concept of an LED down to its most basic form, the researchers saw that they neednít think of LEDs as little domed plastic lightbulbs, but simple stacks of interacting material. This printer can lay down an LED with a sandwich structure thatís not unlike any single pixel in an OLED display ó youíve got an emissive layer (in this case nanoparticles of cadmium selenide generally referred to as quantum dots) sandwiched between one layer that can donate electrons and one layer that can accept them. The whole thing can be fused to a surface thanks to the bottom adhesive layer, which is activated with UV light. Best of all, these printed LEDs are ultra-thin, flexible, and almost totally transparent!
The pixels in a contact lens display can take one of two forms. The active approach, exemplified here, uses each pixel is a light source, emitting photons into the eye and creating an image directly. The passive approach would use far less power but would be much more difficult, using each pixel to bend incoming light from the environment to cast a new picture onto the retina. The problem with the active approach is that it requires a fair amount of power to keep running, and wireless power collection relies partially on the physical size of the collecting antenna; when that antenna must be physically fitted inside a contact lens, it imposes a hard upper limit on power supply.
Science fiction readers have had the benefit of several decades of advance notice for these devices. Take a look at the DreamTime Scleral Contact Lenses from Larry Niven and Steve Barnes's 1992 novel California Voodoo Game and more recently the smart contact lens from Vernor Vinge's 2001 story Fast Times at Fairmont High and of course his more recent novel Rainbows End.
Scroll down for more stories in the same category. (Story submitted 11/28/2014)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 0 )
Related News Stories -
Transparent OLED TV By Panasonic
It's the look of things to come.
Cicret Makes Your Skin Into A Display
'On the translucent mica-like coverings over the orifices, appeared reddish characters...' - Schachner and Zagat, 1931.
Organic Photonic Skin Display
'A strip of readout skin on my wrist...' - John Varley, 1992.
Samsung Patent For Smart Contact Lens Camera Granted
'He realized that it was not quite a clear lens.' - Vernor Vinge, 2001.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Cattle Avoidance Feature In Indian Autonomous Cars
'The driver went about the business of gently slipping the teflon-coated metal scoop beneath the first animal...'
Project KOVR Fashion Protection From Infosphere
'... the entire shroudlike membrane took on whatever physical characteristics were projected at any nanosecond.'
Twist Bioscience High Density Digital Data On DNA
'They tied the memory to the bloodline and that was their record!'
'We're Not Creating A Terminator' Say Russians About Gun-Wielding Robot Fedor
Nobody is thinking about the Terminator. Westworld, maybe.
Vantablack Now IMMEASURABLY Black
'a black coating now thatís ninety-nine percent absorptive...'
Mercedes-Benz Autonomous Taxi Fleet In 3 Years
'... the taxi utilized sophisticated electronic sensors to perceive its surroundings.'
Is 'The Pulsar Positioning System' Evidence For SETI?
'For a hyperspace jump, you need at least four beacons for an accurate fix.'
Someday, You Might Like VR Enough To Move In
'That barrier was going to melt away someday soon. The transhumanists had promised...'
Humans Use Mental Power For Turtle Slavery
Now we need to start looking for animals with fingers...
Solar-Powered Moisture Vaporator
'The atmosphere yielded its moisture with reluctance.'
DxtER! Tricorder Prize Won By Final Frontier Medical Devices
We've been waiting a long time for this, Star Trek fans.
President Trump's Wall As Otra Nation Hyperloop
'...an hollow tube must be constructed the whole distance... as to admit a four wheeled carriage...'
Pickup Lines From Artificial Intelligences
'They hate us, you know... The humans. They'll stop at nothing.'
Pooper Scooper Drone Robot Watchdog 1
'Robots pick up the garbage and junk...'
Cassie Robot Brings AT-ST Walker To Life
There's even a log test!
Hundreds Of Robot Lawnmowers Invade Texas Town
'The mower reached the edge of the lawn, clucked to itself...'
More SF in the News Stories
More Beyond Technovelgy science news stories