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
It Begins: New Calls To Strip Churches of Tax Exempt Status After Same-Sex Marriage Ruling
For years conservatives and proponents of religious liberty in America have warned that if same-sex marriage became legal, the left would then pursue revoking the tax exempt status for religious institutions, particularly Christian churches, around the country.
Just days after the Supreme Court ruled in a 5-4 decision that gay marriage is a constitutional right, progressive activists like Mark Oppenheimer of ...
Physician Linking Autism - Vaccines Found Shot Dead.
James Jeffrey Bradstreet was a hero to many parents. He spent a great part of his life trying to fight for those children who sustained injuries from vaccines via the creation of medical procedures. This included his very own son.
Clearly, his ideas and concepts and science were not accepted by all and created a great many heated debates online. On ...
Pedophiles Now Demanding Equality - Wanting Their Equal Rights to Marriage
Using the same tactics used by “gay” rights activists, pedophiles have begun to seek similar status arguing their desire for children is a sexual orientation no different than heterosexual or homosexuals.
Critics of the homosexual lifestyle have long claimed that once it became acceptable to identify homosexuality as simply an “alternative lifestyle” or sexual orientation, logically nothing would be off limits ...
Time: Orthodox Christians Must Now Learn To Live as Exiles in Our Own Country
Rod Dreher is a senior editor and blogger at The American Conservative.
Voting Republican and other failed culture war strategies are not going to save us now.
No, the sky is not falling â€” not yet, anyway â€” but with the Supreme Court ruling constitutionalizing same-sex marriage, the ground under our feet has shifted tectonically.
It is hard to overstate the significance of ...
Obama: Americans need to shift religious views
From RamZPaul: Friday, President Obama gave a speech in which he said Americans need to change their religious views to be accepting of gay marriage.
|More News » |