Akai ADV-73DR, Service Manual

Page: 49 / 54

Page: 17
7. OPTICAL CHARACTERISTICS
7.1 Optical Specification
Ta=25
Item Symbol Condition MIN TYP MAX Unit Remarks
11
TBD 80 -
12
TBD 80 -
21
TBD 80 -
Viewing Angles
22
CR
"
10
TBD 80 -
Degree Note 7-1
Contrast Ratio CR TBD 450 - Note 7-2
Rising Tr - 30 TBD
Response Time
Falling Tf - 10 TBD
ms Note 7-3
Luminance (I
F
=23mA) L 200 250 - cd/m
2
Note 7-4
x
W
0.26 0.31 0.36
Chromaticity White
y
W
=0°
0.28 0.33 0.38
Note 7-5
7.2 Basic Measure Conditions
(1) Driving voltage
Vcc= 3 V
(2) Ambient Temperature: Ta=25
(3) Testing Point: Measure in the display center point and the test angle =0
(4) LED Current: I
F
=23mA.
(5) Testing Facility
Environmental illumination:
"
1 Lux
35cm
TFT LCD Module
with Backlight
Photometer
Video Signal
Input