A methodology is demonstrated for evaluating dynamic visual performance by comparing a helmet-mounted cathode-ray-tube (CRT) display with a liquid-crystal display (LCD). The miniature CRT contained in the Integrated Helmet and Display Sighting System (IHADSS) used in the AH-64 Apache helicopter was compared to a head-mounted active-matrix LCD (AMLCD) currently under development. Dynamic visual performance was assessed by measuring flicker detection, target recognition vs. duration, and target recognition vs. velocity in five subjects tested with each display. At low-to-moderate rates of stimulus presentation, there was no significant difference in dynamic visual performance between displays. However, at higher rates of presentation, dynamic visual performance was significantly reduced when using an LCD compared to a CRT. These visual-performance differences, which were not explicable by display differences in luminance, color, or spatial resolution, reflect differences in the capacity of each system to generate imagery of sufficient contrast at high rates of presentation.


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    Title :

    Dynamic visual performance: Comparison between helmet-mounted CRTs and LDCs


    Additional title:

    Verfahren zum Vergleichen der dynamischen Bildeigenschaften von Helm-montierten CRTs und LCDs


    Contributors:
    Rabin, J. (author) / Wiley, R. (author)


    Publication date :

    1995


    Size :

    4 Seiten, 5 Bilder, 8 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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