Saturday, October 13, 2012

50th Anniversary: LED Light

How to separate the bright LED lights from the dim bulbs

Published on Friday October 12, 2012

By Tyler Hamilton Energy and Technology Columnist
It didn’t get much attention, but this week marked the 50th anniversary of the invention of the first visible light-emitting diode, or LED, a technology that is well on its way to transforming the lighting industry.

It was on Oct. 9, 1962, when Nick Holonyak Jr., a young scientist at General Electric, showed colleagues in a lab how he could cause a piece of semiconductor material made of gallium arsenide and gallium phosphide to emit visible light — in this case a red glow — when an electric current passed through it.

Four month later, Holonyak boldly predicted in an issue of Reader’s Digest that in time his invention would replace the incandescent light bulb. Through the 1970s orange, green and yellow LEDs appeared, and these proved useful in electronics devices.

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Source: The Toronto Star.

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Glenn A. Walsh, Project Director,
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* Astronomer, Educator, Optician John A. Brashear:
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* Andrew Carnegie & Carnegie Libraries:
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* Civil War Museum of Andrew Carnegie Free Library:
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* Duquesne Incline cable-car railway, Pittsburgh:
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* Public Transit:
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  1. Kudos to Nick Holonyak Jr., who made LED lights available for our generation to enjoy. LED lighting is typically the answer for our growing electric consumption. Imagine, if every house installs LED lights, it can drastically lower our electric consumption and reduce everyone's carbon footprint.

    Allison Shallenberger

  2. I saw may different type of LED lights they are all have different type of quality and feature. All lights are usable on different place but your product much cheap and great. I like your company product they are so useful with many verity!

    By: Austin LED Outdoor Lighting

  3. شركة نقل عفش بالمدينة المنورة شركة نقل اثاث بالرياض شركة نقل عفش بالدمام شركة نقل عفش بالطائف شركة نقل عفش بمكة شركة نقل عفش بينبع

  4. شركة مكافحة حشرات بالدمام
    شركة تنظيف خزانات بجدة الجوهرة من افضل شركات تنظيف الخزانات بجدة حيث ان تنظيف خزانات بجدة يحتاج الى مهارة فى كيفية غسيل وتنظيف الخزانات الكبيرة والصغيرة بجدة على ايدى متخصصين فى تنظيف الخزانات بجدة شركة تنظيف خزانات بجدة شركة كشف تسربات المياه بالدمام شركة الفا لنقل عفش واثاث شركة نقل عفش بجدة

  5. شركة نقل عفش بالقصيم شركة نقل عفش بخميس مشيط شركة نقل عفش بابها شركة نقل عفش بتبوك شركة تنظيف بينبع شركة نقل عفش
    اهم شركات مكافحة حشرات بالخبر كذلك معرض اهم شركة مكافحة حشرات بالدمام والخبر والجبيل والخبر والاحساء والقطيف كذلك شركة رش حشرات بالدمام ومكافحة الحشرات بالخبر