Patent ID: 8808196

Claim:
A flicker threshold measurement device, comprising: an arithmetic processing unit; a display unit that refreshes an image at a specific refresh rate; and an operation unit, wherein: the arithmetic processing unit sets a duration of each of ON periods and OFF periods according to a number of consecutive units of time with one refresh time being defined as one ON period and a consecutive OFF period, and increases or decreases the number of consecutive units of time to determine a duration of consecutive ON and OFF periods, such that the arithmetic processing unit displays the image on the display unit in an ON/OFF manner at a specific timing; the arithmetic processing unit changes a timing of the specific timing by monotonously increasing or decreasing a number of ON periods, during which the image is displayed, per second, and a number of OFF periods, during which the image is not displayed, per second; each of the ON periods and each of the OFF periods is a reciprocal of the refresh rate; the arithmetic processing unit determines the number of ON periods and the number of OFF periods per second at a time when a test subject operates the operation unit as the test subject starts or stops perceiving flicker, as information corresponding to a flicker threshold; and the arithmetic processing unit fixes or changes a ratio of a number of sets of an ON period and a consecutive OFF period comprised of a certain number of units of time to a number of sets of an ON period and a consecutive OFF period comprised of an increased or decreased number of units of time to determine the specific timing.