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Evolution of LEDs

Check how LEDs evolved from a red dot to light bulbs and much more. LED lighting systems are widely used as utility savings for companies and offices. <br><br><br>prosourcepower.com

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Evolution of LEDs

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  1. LED EVOLUTION 

  2. What IS LED Light-emitting diodes are tiny devices made from semiconductor materials that convert electrical energy into visible and near-UV wavelengths — and some heat — when they are assembled in a package and connected to an electrical circuit.

  3. W H E N I T A L L S T A R T E D - In 1907, British researcher Henry Joseph Round noticed for the first time -when a potential of 10 volts is applied to carborundum (silicon carbide) crystal, it emits yellowish light.

  4. W H Y T H E F I R S T L E D W A S R E D ? A dopant is introduced to the semiconductor to determine the colour of the LED. The mixture used in the first LEDs -- gallium arsenide phosphide -- produces a natural red color. That’s why red became the default color choice for so many indicator lights.

  5. LEDFOUND A HOMEIN CALCULATORS Low-power LEDs began replacing incandescent bulbs in electronics, The prices for those electronics fell into a much more consumer- friendly range. 

  6. THELEDWATCH The centuries-old art of watchmaking also felt the presence of the LED when, in 1972, Pulsar introduced the first LED watch. Dubbed the Time Computer.

  7. I n 1 9 9 3 , S h u j i N a k a m u r a h a d a b r e a k t h r o u g h i n d o p i n g t h a t l e d t o b r i g h t b l u e L E D s . B l u e L E D s w i t h y e l l o w p h o s p h o r c o a t i n g s g a v e u s t h e w h i t e L E D a n d a w i d e a r r a y o f a p p l i c a t i o n s . A s L E D s g r e w b r i g h t e r , t h e f l a s h l i g h t i n d u s t r y s w i t c h e d t o L E D l i g h t s . T h e f l a s h l i g h t s u s e d l e s s p o w e r , a n d t h e b u l b s n e v e r h a d t o b e r e p l a c e d .

  8. OPTICAL MOUSE Microsoft introduced the optical mouse in 1999, the mouse used sensors in addition to LED to track the movements of the mouse on any surface.

  9. Any lamp failing to meet the energy standards set by EISA in 2007 could no longer be manufactured. Tungsten- filament incandescents lamps were the most affected by EISA. LEDs bulbs are the most energy efficient option, available in many color variants.

  10. URBANPLANNING In recent years, LEDs are used for street lights and other outdoor lighting purposes. Individually focused lights used on the bridge between San Francisco and Oakland don’t cause windshield glare of standard streetlights is one such example. 

  11. P R O S O U R C E P O W E R . C O M THANK YOU

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