Evaluation of CRT Flicker under Office Viewing Conditions

Flicker detection thresholds were assessed for 10 participants with CRT screens of varying luminance, size, viewing angle eccentricity, and ambient illumination. The test conditions were selected to span the range of typical office applications. Under the test conditions, CRT refresh rate was manipulated using a psychophysical method of limits procedure to estimate the 50% Critical Flicker Frequency (CFF) threshold. Results indicate that CFF increases with increasing display luminance, ambient illumination, and display size. CFF also increases with increasing eccentricity up to about 30 degrees of visual angle. These findings confirm and extend previous research and provide a coherent database for development of quantitative image quality models for use by display designers and for display ergonomics technical standards.