Why is blue tinted backlight better?

Fact: Blue images always look sharper than white images to the user. Siemens Display Technologies implemented blue backlights in its flat panel display product line and had the same feedback from its customers: bluish pictures look brighter. Therefore we wanted to research this theme and try to explain this unique “feature” from a more theoretical point of view. We can explain why, under interior light conditions, the eye is more sensitive in the bluish domain of the color spectrum where both spatial resolution and contrast resolution are optimized. Furthermore, the eye comfort is improved in this configuration.