Three light-emitting diode (LED) and two liquid-crystal (LC) displays were evaluated at 16, 161, and 484 lux on the display to determine each digit's recognition error (in percent) over the range of visual angles from 2.35 to 9.25 min. of arc, and to determine the digits among which the recognition errors (misreadings) were distributed for a given displayed digit. No display type maintained a consistent superiority in terms of percent recognition error over all digits. Analysis of the distribution of misreadings for a given displayed digit indicates a need to re-evaluate some of the digit designs.
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