Hay,
Does the light produced by a white LED and white light produced by mixing Red Green and Blue are different?
I think white light produced from RGB is only due to the property of human eye, isn't it so?

 

Hay,
Does the light produced by a white LED and white light produced by mixing Red Green and Blue are different?
I think white light produced from RGB is only due to the property of human eye, isn't it so?

All light is due to the properties of the human eye as it is perceived by humans.

 

A typical white LED works the same way fluorescent lights do, the blue light underneath a layer of phosphor causes the phosphor to glow. A RGB LED works the same way a color television does.

Electrically blue LEDs and white LEDs are very similar.

 

Hello,

The white led is basicaly a blue led with a phosphorescence layer inside.
The visible spectrum is an addition of both:

This image comes from this page:
http://micro.magnet.fsu.edu/primer/lightandcolor/ledsintro.html

The RGB led is having three small bands of light that can be mixed.
Depending on the type of leds, the band may differ:

This image is from this page:
http://www.theledlight.com/technical3.html

Bertus

 

Some 'white' LEDs mix output from a blue and yellow emitter.
Some actually have RGB emitters.
Most are an excited phosper as others have pointed out.

 

Very informative thread, thank you guys for share your opinion. Actually i am finding info about LED light and normal light. What is the difference between it? please share your viewpoint. Thanks

define "normal light"