Optoma EP721 Family Service Manual page 39

2. Brightness
Procedure
Criteria
3. Ful On/Full Off Contrast
Procedure
Criteria
4. Uniformity
Procedure
Criteria
- Full white pattern
- Use CL100 to measure brightness values of
P1~P9
- Follow the brightness formula to calculate
brightness values
☼ Brightness Formula
Avg. (P1~P9)*1.1m²
- 800 lumen (EP721/727 Family)
- 1100 lumen (EP723/728 Family)
- 1000 lumen (EW1610 Family)
- 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
- 1100:1 (EP721/727 Family)
- 1400:1 (EP723/728 Family)
- 450:1 (EW1610 Family) Family) )
- Full white pattern
- Use CL100 to measure brightness values of P1~P9 (see im-
age: full white)
- Follow the Uniformity formula to calculate
average values
☼ Uniformity Formula
ANSI Uniformity = Avg. (P1, P3, P7, P9)/P5 X100%
• 65 %
EP721/727/723/728 Family / EW1610 Family
Family) )
Family) )
Family) )
Family) )
Family) )
Full white pattern
Full black pattern
Confidential
4-10