Sparkle measurements for an automotive specification: Evaluation method for flexible setup conditions

Abstract

This contribution proposes a sparkle evaluation based on a spatial frequency filter, taking into account various setup influences. Furthermore, the effect of flexible setup conditions on the reproducibility of measurement results is investigated. The procedure and concepts are derived for sampling resolutions between 15 and 30 cpx/mm with display pixel pitches between 183 and 224 ppi and validated by a round-robin experiment with different test devices, including glass and foil-based Anti-Glare Layers. The findings serve as a basis for the measurement conditions of an automotive display sparkle measurement specification.

10‐3: Resolution Capability Measurements: A Comparison Between MTF Slanted Line and Pixel Crosstalk

“…Our test device is a 224 ppi automotive LCD. We combine the display with eight different AGLs (+ no AGL), which showed a significant difference in their perceived sparkle level in a previous study [6]. We can conclude that the AGLs highly affect the transmitted light, affecting the resolution capability.…”