【令人「睛」艳的LED隐形眼镜】

t0y · 发表于 2008-2-24 17:25:15

投射在挡风玻璃上的抬头显示器已经不够炫了，因为美国科学家将发光二极管(LED)制作在隐形眼镜上，目的希望让配戴者除了能看到眼睛的景物，还能同时见到LED显示的画面。这项研究未来可能嘉惠驾驶员、飞行员以及视力受损的患者。

华盛顿大学研发的隐形眼镜原型上，含有驱动电路与红光LED。不过到目前为止，由于研究是着重在眼镜的耐戴性，所以未将LED点亮。研究人员曾让兔子配戴该款隐形眼镜达20分钟，并未发现不良效果。

研究人员采用微制造技术，由厚度仅数奈米的金属层制作出电路，并制造了大小约1/3毫米的LED。形状各异的微小组件在毛细作用(capillary action)下，以自组成的方式附着在弹性塑料片(即隐形眼镜)不同的位置。华大的Babak Parviz指出，该测试用隐形眼镜并没有视力矫正的功能，不过此技术应用到视力矫正型隐形眼镜上应该不成问题。由于眼睛在透明的区域(即瞳孔范围)之外仍有很大的面积，若将线路等置于此处，应该不会妨碍配戴者的视力。

Parviz表示，虽然短时间内还无法达到完整的显示功能，但只有数个像素(pixels)的基本显示功能应该很快就能操作。研究人员计划未来能增加隐形眼镜的无线通讯功能，并希望藉由射频讯号与隐形眼镜上的太阳能电池来驱动整个系统。

配戴这种隐形眼镜的驾驶人或飞行员可以在前方看到他们的行驶速度，游戏玩家能够在游戏的虚拟世界中获得身历其境的感受。网络使用者也能透过虚拟萤幕，安心的浏览信息不必担心会被其它人看到。人们甚至可以发现更多从未想过的应用。Parviz表示，该小组的目的是要展示这项基础技术，并证明它的可行性及安全性。

LED lenses make eyes light upContact lenses with imprinted LEDs could benefit drivers, pilots, or patients with impaired vision.

A researcher holds one of the completed lenses.
Credit: University of Washington

The prototype lenses developed at the University of Washingtoninclude red light-emitting diodes and an electronic circuit, althoughtrials to date have focused on wearability studies and have notincluded turning on the LEDs. The lenses were tested on rabbits for upto 20 minutes and the animals were said to show no adverse effects.

"Looking through a completed lens, you would see what the display isgenerating superimposed on the world outside," said Babak Parviz of theUniversity of Washington. "This is a very small step toward that goal,but I think it's extremely promising."
Researchers built the circuits from layers of metal a few nanometersthick and LEDs one third of a millimeter across using microscopic-scalemanufacturing techniques. The shape of each tiny component dictatedwhich piece it could attach to, and a self-assembly process driven bycapillary action pulled the pieces into position on a sheet of flexibleplastic.

The trial lenses did not provide vision correction, but thetechnique could be used on a corrective lens and does not obstruct thewearer's vision. "There is a large area outside of the transparent partof the eye that we can use for placing instrumentation," said Parviz.

Contact lenses with metal connectors for electronic circuits were safely worn by rabbits in lab tests.
Credit: University of Washington

A full-fledged display will not be available for a while, but aversion with a basic display of just a few pixels could be operational"fairly quickly", according to Parviz. Other improvements in the futurecould include adding wireless communication to and from the lens. Theresearchers hope to power the whole system using a combination of radiofrequency power and solar cells placed on the lens.

Drivers or pilots wearing functioning lenses could see theirvehicle's speed projected ahead of them, while video-game players couldfeel themselves immersed in a virtual world without restrictions ontheir range of motion. Web surfers could see the internet on a virtualscreen visible only to them. "People may find all sorts of applicationswhich we have not thought about," said Parviz. "Our goal is todemonstrate the basic technology, and make sure that it works and thatit's safe."

[ 本帖最后由 t0y 于 2008-2-24 17:28 编辑 ]

tarco · 发表于 2008-3-4 16:22:07

科技日新月異啊......
加油囉....

full92 · 发表于 2008-11-22 21:14:44

不错啊，有人买了用的没？


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【令人「睛」艳的LED隐形眼镜】

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