Static Comparison of Vertical Tape and Vertical Light Emiting Diode Displays
ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
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The study was performed in three parts. The first part consisted of comparing a prototype light emitting diode vertical display with a current vertical tape display, for reading speed and accuracy, under two viewing angles, three levels of illumination, and two time conditions. The results indicated that the sixteen 16 aviators subjects over-estimated the LED instrument while the vertical tape instrument was under-estimated. In addition, absolute errors in reading were greater for the LED display than they were for the vertical display. Time conditions and angles did not have a significant effect, while illumination level for the LEDs was of importance. Part II consisted of a human factors facial design evaluation for one vertical tape display and four prototype LED displays. All displays were found to be deficient when compared to military standards and research recommendations. Part III consisted of a photometric evaluation of the four LED displays. The results showed that these displays were unacceptable for viewing under high ambient light conditions and that gross luminance differences between individual diodes existed within the same display.
- Human Factors Engineering and Man Machine Systems