Production of Yellow LED - Techniques?

Replies

• 

  Abhishek Rawal

  My knowledge is limited in LEDs.
  But as far I know,White light is nothing bit R+G+B.
  Yellow light which is primary color,it seems tough to create it by mixing two colors,anyways theoretically R+G = Y.
  Red light is obtained easily but Green light which is usually used in laser projectors have very high intensity,so R+G is not possible.
  The other mathematical way is White - Blue = R+G+B + (-B) = R+G = Y.Now question is how this removal of Blue light from white light to be done to obtain Yellow light.
  This makes it tough act.
• 

  Scorpion007

  take a look .
  #-Link-Snipped-#
• 

  Jeffrey Arulraj

  Using filters is a large scale solution of your problem #-Link-Snipped-# But in smaller LED scale I think frequency rejectors are better solutions
• 

  Maratiraju

  The_Big_K

  We just wrote about the latest innovation from NXP Semiconductors - production of Yellow LEDs that give you the old 'Yellow' light from the Edison's times. I'm not familiar with how difficult it is to eliminate the 'White' light and make naturally coloured LEDs. Can someone post a bit of information about the techniques used?

  Why do you want to eliminate something from white light to produce yellow light, when it can be directly synthesized??
  Yellow LED's can be directly manufactured using Arsenic as the impurity.