Contact lenses to get built-in virtual graphics
By Vijaysree Venkatraman | NewScientist.com
A contact lens that harvests radio waves to power an LED is paving the way for a new kind of display. The lens is a prototype of a device that could display information beamed from a mobile device.
Realising that display size is increasingly a constraint in mobile devices, Babak Parviz at the University of Washington, in Seattle, hit on the idea of projecting images into the eye from a contact lens.
One of the limitations of current head-up displays is their limited field of view. A contact lens display can have a much wider field of view. "Our hope is to create images that effectively float in front of the user perhaps 50 cm to 1 m away," says Parviz.
The lens uses nanoscale and microscale electronic technology and is powered remotely by harvesting radio waves(Image: Babak Parviz/University of Washington)
His research involves embedding nanoscale and microscale electronic devices in substrates like paper or plastic. He also wears contact lenses. "It was a matter of putting the two together," he says.
Fitting a contact lens with circuitry is challenging. The polymer cannot withstand the temperatures or chemicals used in large-scale microfabrication, Parviz explains. So, some components – the power-harvesting circuitry and the micro light-emitting diode – had to be made separately, encased in a biocompatible material and then placed into crevices carved into the lens.
One obvious problem is powering such a device. The circuitry requires 330 microwatts but doesn't need a battery. Instead, a loop antenna picks up power beamed from a nearby radio source. The team has tested the lens by fitting it to a rabbit.
Parviz says that future versions will be able to harvest power from a user's cell phone, perhaps as it beams information to the lens. They will also have more pixels and an array of microlenses to focus the image so that it appears suspended in front of the wearer's eyes.
Despite the limited space available, each component can be integrated into the lens without obscuring the wearer's view, the researchers claim. As to what kinds of images can be viewed on this screen, the possibilities seem endless. Examples include subtitles when conversing with a foreign-language speaker, directions in unfamiliar territory and captioned photographs. The lens could also serve as a head-up display for pilots or gamers.
Mark Billinghurst, director of the Human Interface Technology Laboratory, in Christchurch, New Zealand, is impressed with the work. "A contact lens that allows virtual graphics to be seamlessly overlaid on the real world could provide a compelling augmented reality experience," he says. This prototype is an important first step in that direction, though it may be years before the lens becomes commercially available, he adds.
The University of Washington team will present their prototype at the Biomedical Circuits and Systems (BioCas 2009) conference at Beijing later this month.
Article from: NewScientist.com
Magnetic contact lenses
Human Interface Technology Lab - Website
Psychic computer that can read people's minds developed
Is Quantum Mechanics Controlling Your Thoughts?
The 'telepathy' chip, turn on the TV using the power of thought
'We'll be able to upload our brains to a computer'
Influencing Human Cognition: US Electromagnetic Weapons and Human Rights
Next-generation toys read brain waves
Latest News from our Front Page
Aurora Shooting Victim Parents Face $200K Court Fees, Bankruptcy, After Failing to Sue Ammo Dealers
The 2012 Colorado Theater Shooting still doesn’t add up…
Media character and ‘Shooter’ James Holmes in court in 2012-2013.
In 2014, Sandy and Lonnie Phillips, the mother and stepfather of Aurora Theater Shooting victim Jessica Redfield Ghawi, tried to sue the ammo companies they believe supplied shooter James Holmes with his ammunition, body armor and other items. They bleived that the online retailer BulkAmmo.com had sold Holmes ...
FBI's Joint Terrorism Task Force Investigating Confederate Flags at MLK's Ebenezer Baptist Church
According to the Atlanta Police Department, two White men left four small Confederate Battle Flags outside MLK’s Ebenezer Baptist Church in Atlanta … and get this, the FBI’s Joint Terrorism Task Force is on the scene investigating the incident.
Atlanta police Chief George Turner said his agency was working with federal authorities and they have not determined what charges might be ...
Democratic National Committee Chair Wasserman Schultz Canâ€™t Explain Difference Between Democrat Party and Socialism
Things got very awkward today when Chris Matthews asked DNC Chair Debbie Wasserman Schultz what the difference was between the modern Democratic Party and Socialism.
We havenâ€™t seen that dazed look since Rachel Dolezal was busted as a fraud.
Wasserman Schultz was speechless.
Then changed the subject.
Because we all know there is no difference between todayâ€™s Democrat Party and the radical ...
Catching on slow: Yet Another Study Show Cellphone Radiation Cause Cancer
The scientists were right — your cell phone can give you cancer.
There have long been whispers of a cancer connection from your cell — and a new study backs up the claims.
"These data are a clear sign of the real risks this kind of radiation poses for human health," study author Igor Yakymenko said.
Yakymenko’s meta-study — basically a study of ...
Trump Goes #Cuckservative on Immigration
For weeks, the media have trumpeted the supposed death of the Trump campaign. First, they claimed, Trump’s campaign imploded on launch thanks to his comments about illegal immigration. Then they claimed that Trump was finished because of his slap at Senator’s (R-AZ) war service. But neither of those comments alienated Trump’s base – he’s maintained his seven point lead over ...
|More News » |