Why do we need convert RGB color space to XYZ space?

[Osawa_Odessa]

Hi,
Could you help me?
Why do we need convert RGB color space to XYZ space?
I mean what is the benefits of XYZ space over RGB color space.
Thanks.

 

[D.A.(Tony)Stewart]

Perhaps you mean the CIE color space using x,y coordinate. This gives the human eye color corrected value for daylight colors. Although a neutral white from RGB is still not a wide spectrum as a white led with broad spectrum phosphors.