Acer AL1714 AL1714 Service Guide - Page 10

Note (1) Definition of Viewing Angle (θx, θy): Normal θx = θy = 0º θX- = 90º x- θy- θy+ θxθx+ 12 o'clock direction y+ θy+ = 90º 6 o'clock θy- = 90º y- x+ θX+ = 90º Note (2) Definition of Contrast Ratio (CR): The contrast ratio can be calculated by the following expression and figure below. Contrast Ratio (CR) = L255 / L0 L255: Luminance of gray level 255 L 0: Luminance of gray level 0 CR = CR (5) CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note (5). Definition of luminance measured points and Brightness Uniformity: Horizontal Line Number 0 320 640 960 1280 0 256 512 768 1024 1 2 5 3 4 X : test point X=1 to 5 Vertical Line Number Active area Horizontal Line Number [pixel] 10