Acer M190E5-L0A, Service Manual

Page: 12 / 38

12
(3) Definition of Response Time (T
R
, T
F
) and Measurement Method:
(4) Luminance, Chromaticity and CCT Measurement
Measurement System Setup:
The LCD module should be stabilized at given temperature for 15 minutes to avoid abrupt
temperature change during measuring. In order to stabilize the luminance, the measurement
should be executed after lighting Backlight for 15 minutes in a windless room.
T
F
T
R
Time
Gray Level 0
Gray Level 255
Optical
Response
100%
90%
10%
0%
Gray Level 255
Spectrometer
(Minolta CS1000T)
500 mm
LCD Module
LCD Panel
Center of the Screen
Light Shield Room
(Ambient Luminance < 2 lux)