Though not completely related to the slide, this is the closest to the notion, so here it goes. For most LCD displays the color signal often looks like complete garbage if you were to look at the raw unconverted curves. LED backlights are often not white, but rather a colored light treated with a YAG phosphor to mix into white, utilizing the "full width, half-max" - the width of the curve at half of its max amplitude. This treatment creates a mess of colors as YAG phosphors often have massive contaminating colors. The result is then filtered at a display's subpixels into RGB which introduces its own errors. It really makes you stop and think how color accurate work is ever done.
Though not completely related to the slide, this is the closest to the notion, so here it goes. For most LCD displays the color signal often looks like complete garbage if you were to look at the raw unconverted curves. LED backlights are often not white, but rather a colored light treated with a YAG phosphor to mix into white, utilizing the "full width, half-max" - the width of the curve at half of its max amplitude. This treatment creates a mess of colors as YAG phosphors often have massive contaminating colors. The result is then filtered at a display's subpixels into RGB which introduces its own errors. It really makes you stop and think how color accurate work is ever done.