Abstract
ABSTRACT High-quality airborne display benefits pilots of making correct interpretation and operation in time, and avoids from moving body due to the unclear transmission of flight data which may lead to flying risk. A directional modulated light-emitting technology based on airborne display is proposed in this paper which can be used on Diamond DA42 New Generation aircraft. Using the proposed technology, a composite optical film with micro-structure is designed which can realise the redistribution of light intensity according to the viewing demand. A collimated display is introduced to reduce the colour shift. When the optical film is attached on a collimated display, the incident light of small viewing angles can be directionally modulated and concentrated to the large viewing angles which are just effective pilot and co-pilot viewing angles. The calculation results show that the brightness of airborne display on two pilots’ viewing angles can be increased by 38.9% and 58.7% respectively after using the proposed technology. Meanwhile, the emergent angles from the collimated display are smaller than both two pilots’ viewing angles, so the proposed optical film is beneficial to reduce the colour shift and resulting in a better display quality.
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