Optoma EP720 Family Service Manual page 41

3. Ful On/Full Off Contrast
Procedure
Criteria
4. Uniformity
Procedure
Criteria
- Full white pattern & full black pattern
- Use CL100 to measure brightness values of full
white pattern P5 & full black pattern B5 ( see im-
age: full white)
- Follow Contrast formula to calculate contrast
values.
☼ Contrast Formula
P5/B5
note: P5=center of white image
B5 = the center of black image.
- 1400:1
- 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
ANSI Uniformity = Avg. (P1, P3, P7, P9)
- 65 %
EP720 Family/EP726 Family
X100%
P5
Full white pattern
Full black pattern
Confidential
4-0