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boruwei

金虫 (正式写手)

[交流] 【前沿】大尺寸可弯曲的显示屏问世

美国研究人员宣称,他们已经找到了制造宽大、可弯曲显示屏的新方法,这样的显示屏可用于制造沿车体弧度安装的刹车灯指示器,同时透明度很高,乘客完全可以看见窗外的风景。相关论文发表在近期出版的《科学》杂志上。

美国伊利诺伊大学厄本那-香槟分校的约翰·罗杰斯领导了该项研究,他表示,这种纤细、轻薄的屏幕可用来制作刹车指示灯、健康监测器,或者像毛毯一样将病人包裹起来的成像设备。

研究人员指出,这种大型显示屏既有发光二极管(LED)耐用、屏幕大的特点(发光二极管因此被用来制造平板的灯光广告牌),同时,因为它由有机的含碳物质制造而出,还具有独特的柔韧性。

目前,通过无机材料可以制造大块的、单个的发光二极管光束,这些光束需要自动装置来逐一重新排列;使用有机材料制成的显示屏能够被喷洒或者涂在胶片的表面,但是它们不够明亮,而且耐用性也比较差。能否将两者的优势结合起来,取长补短加以利用呢?

为了解决这个问题,研究人员在一层薄薄的胶片上制造了发光二极管,并用化学物质将其溶解,接着在两个角落贴上细小的塑料标签,以确保这些发光二极管不会在“化学浴”中被冲走。

随后,研究人员使用一种特殊的冲压技术将这些无机的发光二极管沉积于玻璃、塑料或橡胶表面,并将它们组合在一起。

这些发光二极管能够相互连接并且通上电,就像给计算机芯片通电一样。因为发光二极管即使相隔很远来放置也可以提供足够的光亮,因此,得到的面板和显示屏几乎是透明的。

罗杰斯表示,新方法能够一步到位地将大量小而薄的发光二极管从表面提起,接着将它们印在一个基座上,因此,将这些发光二极管放在塑料上就可以制造刹车灯。

罗杰斯的研究项目最初由福特汽车公司资助,福特汽车公司想要找到一种方法来制造同汽车的外形轮廓相匹配的汽车刹车灯指示器。

Science 21 August 2009:
Vol. 325. no. 5943, pp. 977 - 981
DOI: 10.1126/science.1175690
       
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Reports
Printed Assemblies of Inorganic Light-Emitting Diodes for Deformable and Semitransparent Displays
Sang-Il Park,1,* Yujie Xiong,1,*,{dagger} Rak-Hwan Kim,1,* Paulius Elvikis,2 Matthew Meitl,3 Dae-Hyeong Kim,1 Jian Wu,4 Jongseung Yoon,1 Chang-Jae Yu,1 Zhuangjian Liu,5 Yonggang Huang,4,6 Keh-chih Hwang,7 Placid Ferreira,2 Xiuling Li,8 Kent Choquette,8 John A. Rogers1,2,{ddagger}

We have developed methods for creating microscale inorganic light-emitting diodes (LEDs) and for assembling and interconnecting them into unusual display and lighting systems. The LEDs use specialized epitaxial semiconductor layers that allow delineation and release of large collections of ultrathin devices. Diverse shapes are possible, with dimensions from micrometers to millimeters, in either flat or "wavy" configurations. Printing-based assembly methods can deposit these devices on substrates of glass, plastic, or rubber, in arbitrary spatial layouts and over areas that can be much larger than those of the growth wafer. The thin geometries of these LEDs enable them to be interconnected by conventional planar processing techniques. Displays, lighting elements, and related systems formed in this manner can offer interesting mechanical and optical properties.

1 Departments of Materials Science and Engineering, Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1304 West Green Street, Urbana, IL 61801, USA.
2 Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL 61801, USA.
3 Semprius, Durham, NC 27713, USA.
4 Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA.
5 Institute of High Performance Computing, 1 Fusionopolis Way, 16-16 Connexis, Singapore 138632.
6 Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA.
7 Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.
8 Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL 61801, USA.
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stone1235617

木虫 (正式写手)

NB。。。太强大啦。。
2楼2009-08-28 22:21:48
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