The display device according to claim 30, where the display luminance provides a brightness level according to the equation, B = Bo ??? [ B ??? ??? max B ??? ??? min ] ( ( SNS - So ) / ( T - 1 ) ) ??? BGL C where B is a display emitted luminance, Bo is a constant corresponding to a brightness offset on a log-log plot of the relationship between the display emitted luminance and the display backgro