Acer P5271 Acer P5271, P5271i, P5290 and P5390W Projector Series Service Guide - Page 74

2. Brightness Procedure Criteria - Full white pattern - Use CL100 to measure brightness values of P1~P9. - Follow the brightness formula to calculate brightness values. ☼ Brightness F ormula Avg. (P1~P9)*1.1m2 ● 1300 ANSI lumen (for P5271/P5271i) ● 1750 ANSI lumen (for P5290/P5390W) Full white pattern 3. Full On/Full Off Contrast Procedure - Full white pattern & full black pattern - Use CL100 to measure brightness values of full white pattern P5 & full black pattern B5 - Follow Contrast formula to calculate contrast values. ☼ Contrast F ormula P5/B5 Note: P 5 = L��u�x��o��f�c���e���n���t�e���r���i�n����f��u��l��l��w h����i��t��e p���a��t��t�e�r�n�� B5 =Lux of center in full black pattern Criteria ● 2800: 1 (for P5271�/P�5�2��7�1�i/�P�5��2�9�0�/P��5�3�9�0�W���) 4. Uniformity Procedure Criteria - Full white pattern - Use CL100 to measure brightness values of P1~P9 (see image: full white). - Follow the Uniformity formula to calculate average values. ☼ Uniformity F ormula JBMA Uniformity = Avg. (P1, P3, P7, P9)/P5X100% ● 65% Full black pattern P5271/P5290/P5390W/P5271i Confidential 4-10