“…A telescopic-type luminance meter (LS-100, Konica Minolta, Tokyo, Japan) was used for the measurements of luminance of the LCD monitors. The luminance performance of the LCD monitors as a function of viewing angle, i.e., -60°, -50°, -40°, -30°, -20°, -10°, 0°, 10°, 20°, 30°, 40°, 50°, and 60°, was measured using the TG-BN test patterns (modified TG-LN test patterns with a black background [11] and currently available on the WEB) [9] in different directions (horizontal, vertical, and diagonal directions). TG-BN test patterns consist of 18 patterns (TG-BN 1-18) with different central-area brightnesses.…”