Display Luminance Management Algorithm in Aviation Cockpit

Abstract

An effective and reasonable luminance control algorithm, with ambient and forward field of view illumination compensation, has been proposed. This paper analyses the airworthiness requirement and human eye characteristics in terms of visual sensitive and as the basis of luminance control research. This algorithm introduces the display luminance comparison method to maintain the luminance consistency among all the head-down displays. The relationship between display luminance and ambient light is realized by power function to approximate the eye logarithmic response. Based on Webber-Fechner law, the adaptive mismatch compensation is utilized for the eye adaptation for transitions from forward field of view luminance levels. Considering the compensation for the display aging and the individual preference, the log-linear manual adjustment could help the crew to achieve the comfortable visual effect.