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Copyright © 2008 LG Electronics. Inc. All right reserved. 39 LGE Internal Use Only
Only for training and service purposes
39
6.1.2 Spec and Default Settings
a) System Gamma definition is S-curve based on LGE PQ set and also is generated based on the color
temperature Cool, Medium and Warm (see below definition).
b) Spec of color temperatures (for RD development stage)
Color Temp.
x
y
Tolerance
Cool
0.276
0.283
±0.002
Medium
0.285
0.293
±0.002
Warm
0.313
0.329
±0.002
c) Default settings
- Component with NTSC signal
Color Temperature(NTSC)
Cool
Medium
Warm
Red Gain
50.00
50.00
50.00
Green Gain
50.00
50.00
50.00
Blue Gain
50.00
50.00
50.00
Red Offset
50.00
50.00
50.00
Green Offset
50.00
50.00
50.00
Blue Offset
50.00
50.00
50.00
Note: RGB gain/offsets are in the range from 48 to 52 is suggested.
6.1.3 Color Temperature Alignment and Theorem
a) Measurement equipment and condition
- Equipment
Color Meter: Minolta CA210 or equivalent
Signal Generator: Astro VG859 or equivalent
- Condition
Measurement Point: Center of screen
Measurement Distance: 50mm
Measurement Angle: 90 degree
b) Adjustment method
First, correct signal level is a must. Front-end video digital level is calibrated and implemented as default in
software. Since analog signals are processed via ADC, we need to calibration three signals “AV-CVBS” “PC”