Acer B223PWL Acer B223PWL and V223PWL Monitor Service Guide - Page 15

13 Dim Line: When the unit lights, line(s) in the minor (vertical) or major (horizontal) axis appear dim, but not completely on or off. Cross Lines Off: When the unit lights , lines in both the minor and major axis do not appear. Bright/Dark Dot: A sub - pixel (R, G, B dot) stuck off / on (electrical). 1.5 Optical Characteristics: 1.5.1 Measurement method: The LCD module should be stabilized at given temperature for 40 minutes to avoid abrupt temperature change during measuring . In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 40 minutes in a stable, windless room. 1.5.2 Definition of viewing angle measured by ELDIM (EZContrast 88) Viewing angle is the measurement of contrast ratio ≧10, at the screen center, over a 180° horizontal and 180° vertical range (off-normal viewing angles). The 180° viewing angle range is broken down as follows; 90° (_) horizontal left and right and 90° (_) vertical, high (up) and low (down). The measurement direction is typically perpendicular to the display surface with the screen rotated about its center to develop the desired measurement viewing angle