Optoma HD82 Serivce Manual page 55

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 image: 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.
● 1300:1
- 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
JBMA Uniformity = Avg. (P1, P3, P7, P9)/P5X100%
● 70%
HD82/HD8200 Confidential
Full white pattern
Full black pattern
4-2