Optoma EX615 - Page 52

Condential
4-14
EX540/EX542/EX612/EX615/EX762/EX540I/EX542I/ES523ST/EW533ST
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 Formula
P5/B5
Note: P5=center of white image
B5 = the center of black image.
Criteria • 1600:1 (for EX540/EX542/EX612/EX615/
EX762/EX540I/EX542I)
• 1750:1 (for ES523ST/EW533ST)• 1750:1 (for ES523ST/EW533ST)1750:1 (for ES523ST/EW533ST)ES523ST/EW533ST)
4. Uniformity
Procedure - 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 Formula
JBMA Uniformity = Avg. (P1, P3, P7, P9)/
P5X100%
Criteria • 70%
Full black pattern
Full white pattern