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Tuesday, October 30, 2007


De ariba a abajo: Niño huichol leyendo con luz LED, diodos en bolsillos portables, mini-paneles solares, bolso portable de 1,5 kilos.

A team of scientists and designers (Sheila Kennedy, architect Kennedy & Violich Architecture. Ltd: KVA/Boston), have patented a device: Portable Light Project, capable to generate digital solid state light (80-160 lumes per watt up for 2 ½ hours), anywhere in the world. The device consists of a row of LEDs (semiconductors that allow passage of electric unidirectional current, with jumps of electrons from the conduction to the valence band, emiting photons), light-emitting continuous filament without glasses or wires. White light LEDs, inserted into textile fibers pockets (clothes, handbags), provide light at night making possible to read, to work and lighting of the houses of 300 Huicholes natives of Sierra Grande/Mexico. During the day, solar photovoltaics minipanels, flexibles (5 x 2 cm), carried on the shoulders of natives stored sunlight (over 4 hours), which recharged standard lithium ion batteries, which in turn lit LEDs. The price of the device: 40-50 dollars -in batches of 500- still are expensive, but we must consider the 30-year duration of LEDs. Panels, batteries, LEDs and circuits are located in various parts and pockets of a portable bag that weighs on average 1.5-2 kilos. Proposers of Portable Light Project ensures that these devices may illuminate the homes of 2 billion people worldwide.


Un equipo de científicos y diseñadores (Sheila Kennedy , arquitecta de
Kennedy & Violich Architecture. Ltd : KVA/Boston), han patentado un dispositivo : Portable Light Project, capáz de generar luz digital de estado sólido (80-160 lumes por watt, hasta por 2 ½ horas), en cualquier lugar del mundo. El dispositivo consta de una hilera de LEDs (semiconductores que permiten el paso de corriente eléctrica unidireccional, con saltos de electrónes de la banda de conducción a la de valencia, con desprendimiento de fotones), emisores de luz continua, sin vidrios o filamentos de por medio. LEDs, de luz blanca, insertados en bolsillos de fibras de textiles (ropa, bolsos), proporcionan luz de noche haciendo posible la lectura, el trabajo e iluminación de las casas de 300 nativos huicholes de Sierra Grande/Mexico. Durante el dia, minipaneles solares fotovoltaicos, flexibles, planos (5 x 2 cm), portados en los hombros de nativos almacenan luz solar (durante 4 horas), que recargan baterias standard de iones de litio que a su vez encienden LEDs. Los precios del dispositivo : 40-50 dolares -en lotes de 500- aún son caros, empero hay que considerar los 30 años de duración, de los LEDs. Paneles, pilas, LEDS y circuitos, se ubican en diversas partes y bolsillos de una bolsa portable que pesa en promedio 1,5-2 kilos. Los propulsores del Portable Light Project aseguran que con estos dispositivos es posible iluminar los hogares de 2 billones de personas en todo el mundo.



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