Optoma HD25 Service Manual page 28

b. Brightness
Procedure
Criteria
c. Full On/Full Off Contrast
Procedure
Criteria
d. 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)*1.1m
• 618 ANSI lumen (HD25)
1287 ANSI lumen (HD25LV)
792 ANSI lumen (HD25e)
- 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 = Lux of center in full white pattern
B5 = Lux of center in full black pattern
• 1530:1
- 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) /
• 70%
2
P5 *100%
HD25/HD25LV/HD25e
Full white pattern
Full black pattern
Full white pattern
Confidential
4-7