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Measurement of Flicker Produced by Visual Display Units Disclosure Number: IPCOM000059921D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08

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Chaplin, R Freemantle, RA [+details]


In order to provide a method for measuring the flicker level present in visual display units (VDUs), a peripheral aggravation index is derived from sampling individuals' vision. The index so found is then used as a datum for a scale of peripheral aggravation. Certain parameters of flicker perception in humans are common and can be described by a characteristic shape in terms of frequency and magnitude. Other environmental variables such as time average luminance and spatial factors of the field of view are controlled by the technique described below. First, a percentile of population for the limit of flicker perception is created in the same environment that will later be used to carry out VDU flicker level measurements.