SCC is a place where u can get free study material for academic & competitive exams like CTET,SSC,IIT,NDA,Medical exams etc,

Thursday, 18 February 2016

LIGHT EMITTING DIODE (LED), PRINCIPLE OF OPERATION

LIGHT EMITTING DIODE (LED)
An LED is a specially fabricated P-N junction diode that emits monochromatic light when it is forward biased.
LED is invented 1st  by “OLEG  LOSEV “in 1927.
First practical of visible spectrum (red) was developed in 1962 by “NICK HOLONYAK”. so He is called the FATHER of  LED.
In 1968 “Man Santo company” was the first organization to mass produce visible LEDs using GaAsp .

The lifetime of LEDs are 25000 to 100000 hours. But heat and current setting can extend or shorten this time.
 PRINCIPLE OF OPERATION
The operation of LED is based upon the phenomenon of electro luminance
When a P-n junction is f/w biased then free electrons cross the
N-region and recombine with holes existing in p-region .
free  electrons are in  C.b.  (high energy level) while holes  are in V.b.  ( low energy level).
As these electrons fall from higher energy to lower energy level  recombine with holes then these radiated energy in the form of heat and light
Led produces light while conducting current  through them so led are current driven devices.
LIGHT EMITTING DIODE (LED), PRINCIPLE OF OPERATION,
COLOR OF LED
The color of light emitting diode depends upon various factors such as 



To read complete topic click here ..........
LIGHT EMITTING DIODE (LED), PRINCIPLE OF OPERATION

Share on Google Plus Share on whatsapp

  18 comments:

  1. Very informative article, Which you have shared here about the light emitting diode. After reading your article I got very much information about the LED and It is very useful for us. If anyone looking for the Physics Tutor Online, teacherlookup is the best for you.

    ReplyDelete
  2. This is my first time i visit here and I found so many interesting stuff in your blog especially it's discussion, thank you. best led track lighting

    ReplyDelete
  3. Awesome dispatch! I am indeed getting apt to over this info, is truly neighborly my buddy. Likewise fantastic blog here among many of the costly info you acquire. Reserve up the beneficial process you are doing here. entryway chandeliers

    ReplyDelete
  4. You have done a good job with your knowledge that makes our work easy because you are providing such good information. Keep sharing this kind of knowledge with us. Buy Indoor Pendant Lights in Ireland

    ReplyDelete
  5. I really enjoyed reading this post, big fan. Keep up the good work andplease tell me when can you publish more articles or where can I read more on the subject? LED Strip light

    ReplyDelete
  6. The article was up to the point and described the information very effectively. Thanks to blog author for sharing an informative post. Plug and play T12 LED tubes

    ReplyDelete
  7. This article is an appealing wealth of informative data that is interesting and well-written. I commend your hard work on this and thank you for this information. You’ve got what it takes to get attention. electrician in Lawrenceville GA

    ReplyDelete
  8. Your article is very informative and I am impressed by the details of led light, that you have shared here in the post. Thank you for sharing the article with us.outdoor lighting new zealand

    ReplyDelete
  9. Think about some essential definitions regardless as a methods for understanding the job of an instructor. "Training" alludes to giving guidance; "teacher" alludes to the individual who gives guidance and is somebody who is gifted in educating; and instructing is lined up with giving clarifications. Hvordan-man.dk

    ReplyDelete
  10. Philosophy is the study of realities, pursuit of wisdom, and commentary on general principles of life. It is concerned with a search of eternal truth, both conceptual as well as practical. It has five areas of search - Epistemology, Metaphysics, Aesthetics, Ethics and History. The instrument used by philosophy to unearth realities or to discover truth is logic, both inductive as well deductive. Educational philosophy is a branch of general philosophy, it gains strength from epistemology. It formulates the aims and objectives or contents of education that, in turn, influence the whole learning environment, society, and future generations. english class for foreigner

    ReplyDelete
  11. Took me time to read all the comments, but I really enjoyed the article. It proved to be Very helpful to me and I am sure to all the commenters here! It’s always nice when you can not only be informed, but also entertained! Assignment answer Class 9

    ReplyDelete
  12. Philosophy is the study of realities, pursuit of wisdom, and commentary on general principles of life. It is concerned with a search of eternal truth, both conceptual as well as practical. It has five areas of search - Epistemology, Metaphysics, Aesthetics, Ethics and History. The instrument used by philosophy to unearth realities or to discover truth is logic, both inductive as well deductive. Educational philosophy is a branch of general philosophy, it gains strength from epistemology. It formulates the aims and objectives or contents of Class 7 Assignment 2021 that, in turn, influence the whole learning environment, society, and future generations.

    ReplyDelete
  13. I understand this column. I realize You put a many of struggle to found this story. I admire your process. 3rd week assignment 2021 answer

    ReplyDelete
  14. Much thanks to you for the redesign, extremely pleasant site.. Assignment Syllabus 2021

    ReplyDelete
  15. I am very thankful to you as the post you have shared here about lights is amazing. Through this post I got some helpful knowledge. Thanks for posting it.Solar Street Light. Keep posting.

    ReplyDelete
  16. Thank you very much for the information. We are very thankful to you. Check GST Primary Selection List

    ReplyDelete
  17. I’m not that much of a internet reader to be honest but your sites really nice, keep it up! I’ll go ahead and bookmark your website to come back later. All the best led module

    ReplyDelete
  18. Very good, This information is essential and informative which you have shared here. It is beneficial for beginners to develop their knowledge. It is very gainful information. Thanks for share it. Buy Double ended grow lights for plants online

    ReplyDelete

Download app for android

Download app for android

Search

Popular Posts

Facebook

Blogger Tips and TricksLatest Tips For BloggersBlogger Tricks
SCC Education © 2017. Powered by Blogger.

Total Pageviews