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Nanotubes enter flat-panel display market
23 May 2005
LCD, plasma and OLED displays could soon have a new challenger. Motorola Labs, the applied
research arm of Motorola, has unveiled a prototype nano-emissive display (NED) based on
carbon nanotubes.
Nanotube display
"Our NED display is basically a thin, flat cathode ray tube with thousands of electron guns
at each pixel," a spokesperson for Motorola told Optics.org. "The prototype has full colour
video, high brightness, uniformity and colour purity in the ranges required for a commercial
product. It shows NEDs have a promising future for use in flat panel displays."
The key to the development is Motorola's ability to grow carbon nanotubes directly onto the
display's glass substrate. In the past, carbon nanotubes have been pasted or printed onto a
surface but the quality of the resulting display has been disappointing.
"On a back plate, only 3 mm behind each sub-pixel, we place a small structure that contains
about one thousand carbon nanotubes arranged such that a properly applied voltage excites
each nanotube to bombard the colour phosphors with electrons," explained the spokesperson.
With a thickness of just 3.3 millimetres, the prototype is a 5-inch diagonal section of a
42-inch 1280x720 high-definition television and has a refresh rate of 60 Hz.
Motorola estimates that a 42-inch NED running typical video would consume 75 W. In comparison,
the firm says a similar LCD would consume around 180 W because it requires a 60 W backlight
and matrix switching.
Motorola now plans to license the technology to panel manufacturers. "Motorola is ready to
deliver this technology to manufacturers today," said the spokesperson. "We estimate that
this technology can be commercialized in the very near term, depending on the aggressiveness
of the licensees."
The prototype has also been given the thumbs up by display analysts. "Motorola's NED technology
is demonstrating full colour video with good response time," said Barry Young, the CFO of
DisplaySearch. "According to a detailed cost model analysis conducted by our firm, we estimate
the manufactured cost for a 40-inch NED panel could be under $400."
奈米碳管顯示器即將問世 2005/06/01
液晶、電漿以及有機電致發光(OLED)顯示器即將遇到新的競爭對手。摩托羅拉公司麾下的Motorola Labs最近發表
了以奈米碳管(carbon nanotube)作為電子源的奈米發射顯示器(nano-emissive display, NED)原型。
摩托羅拉的發言人表示，NED基本上是薄而平的陰極射線管(cathode ray tube)，它在每一個畫素(pixel)上有數
千個奈米碳管電子槍，目前的全彩顯示器原型具有高亮度、高均勻性與高色純度等特點，符合顯示器商業產品的需求
，因此非常有潛力成為下一世代的平面顯示器(flat panel display)。
以往，奈米碳管場發射顯示器都是以黏貼或網印的方式，將奈米碳管附著於顯示器玻璃基板的表面，然而顯示效果並
不理想。摩托羅拉有別於此，發展出直接在玻璃基板上成長奈米碳管的製程，因此所得到的奈米碳管電子源品質更好。
摩托羅拉的研究人員在每個次畫素後僅3 mm的背板上，製作了約由一千根碳管組成的小結構，一旦加上適當的電壓，
碳管就會發射電子轟擊彩色磷粉，點亮該畫素。摩托羅拉估計一台42吋NED消耗功率約75W，而同樣大小的液晶顯示器
由於需要背光及矩陣開關，大約要消耗180W。
摩托羅拉公司計畫將此項技術授權給面板製造廠，他們並預估NED在近期內即可完成商品化。此外，根據DisplaySearch
公司的評估，40吋NED面板的製造成本將可低於400美元。
原始網站: http://www.nanotechweb.org/articles/news/4/5/11/1
23 May 2005
LCD, plasma and OLED displays could soon have a new challenger. Motorola Labs, the applied
research arm of Motorola, has unveiled a prototype nano-emissive display (NED) based on
carbon nanotubes.
Nanotube display
"Our NED display is basically a thin, flat cathode ray tube with thousands of electron guns
at each pixel," a spokesperson for Motorola told Optics.org. "The prototype has full colour
video, high brightness, uniformity and colour purity in the ranges required for a commercial
product. It shows NEDs have a promising future for use in flat panel displays."
The key to the development is Motorola's ability to grow carbon nanotubes directly onto the
display's glass substrate. In the past, carbon nanotubes have been pasted or printed onto a
surface but the quality of the resulting display has been disappointing.
"On a back plate, only 3 mm behind each sub-pixel, we place a small structure that contains
about one thousand carbon nanotubes arranged such that a properly applied voltage excites
each nanotube to bombard the colour phosphors with electrons," explained the spokesperson.
With a thickness of just 3.3 millimetres, the prototype is a 5-inch diagonal section of a
42-inch 1280x720 high-definition television and has a refresh rate of 60 Hz.
Motorola estimates that a 42-inch NED running typical video would consume 75 W. In comparison,
the firm says a similar LCD would consume around 180 W because it requires a 60 W backlight
and matrix switching.
Motorola now plans to license the technology to panel manufacturers. "Motorola is ready to
deliver this technology to manufacturers today," said the spokesperson. "We estimate that
this technology can be commercialized in the very near term, depending on the aggressiveness
of the licensees."
The prototype has also been given the thumbs up by display analysts. "Motorola's NED technology
is demonstrating full colour video with good response time," said Barry Young, the CFO of
DisplaySearch. "According to a detailed cost model analysis conducted by our firm, we estimate
the manufactured cost for a 40-inch NED panel could be under $400."
奈米碳管顯示器即將問世 2005/06/01
液晶、電漿以及有機電致發光(OLED)顯示器即將遇到新的競爭對手。摩托羅拉公司麾下的Motorola Labs最近發表
了以奈米碳管(carbon nanotube)作為電子源的奈米發射顯示器(nano-emissive display, NED)原型。
摩托羅拉的發言人表示，NED基本上是薄而平的陰極射線管(cathode ray tube)，它在每一個畫素(pixel)上有數
千個奈米碳管電子槍，目前的全彩顯示器原型具有高亮度、高均勻性與高色純度等特點，符合顯示器商業產品的需求
，因此非常有潛力成為下一世代的平面顯示器(flat panel display)。
以往，奈米碳管場發射顯示器都是以黏貼或網印的方式，將奈米碳管附著於顯示器玻璃基板的表面，然而顯示效果並
不理想。摩托羅拉有別於此，發展出直接在玻璃基板上成長奈米碳管的製程，因此所得到的奈米碳管電子源品質更好。
摩托羅拉的研究人員在每個次畫素後僅3 mm的背板上，製作了約由一千根碳管組成的小結構，一旦加上適當的電壓，
碳管就會發射電子轟擊彩色磷粉，點亮該畫素。摩托羅拉估計一台42吋NED消耗功率約75W，而同樣大小的液晶顯示器
由於需要背光及矩陣開關，大約要消耗180W。
摩托羅拉公司計畫將此項技術授權給面板製造廠，他們並預估NED在近期內即可完成商品化。此外，根據DisplaySearch
公司的評估，40吋NED面板的製造成本將可低於400美元。
原始網站: http://www.nanotechweb.org/articles/news/4/5/11/1
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