Read LG 37LH40 / 37LH41 (CHASSIS:LA92G) Service Manual online
- 7 -
C
2009
5. Chroma& Brightness
5.1 Module optical specification
No.
Item Specification
Min.
Typ.
Max.
Remark
1.
Max Luminance
Modele
400
500
cd/m2
(Center1-point/ Ful white pattern)
2.
Luminance uniformity
Luminance
77
%
3. Contrast Ratio
1000: 1
1400: 1
4000: 1(DCR) 50000:1(DCR)
WX
Typ 0.279
Typ
White
WY
-0.03
0.292
+0.03
4.
Color Coordinates
Xr
636
RED
Yr
334
Xg 290
Green
Yg 608
Xb 145
Blue
Yb
064
5. Color Temperatue
Cool
0.274
0.276
0.278
85% Full white pattern
0.281
0.283
0.285
**The W/B Tolerance is
Medium
0.283
0.285
0.287
± 0.015 for Adjustment
0.291
0.293
0.295
Dynamic contrast :off
Warm
0.311
0.313
0.315
Dynamic color :off
0.327
0.329
0.331
Energy saving mode :off
6.
Color Distortion, DG
10.0
%
7.
Color Distortion,DP
10.0 deg
8.
Color S/N,AM/FM
43.0
dB
9.
Color Killer Sensitivity
-80
dB
* Max Luminance &Contrast measure standard specification
- Max Luminance measure specification
1) In non-impressed condition, measure peak brightness displayable as much as possible LCD module.
2) Measuring instrument: CA-210 or a sort of Color Analyzer.
3) Pattern Generator :VG- 828 or a sort of digital pattern generator (displayable Full White &1/25 White Window pattern)
4) Measure condition
• Test pattern: in center,1/5(H)*1/5(V) of Window Pattern (white pattern in non-impressed condition)
• SET condition: Contrast &Brightness Level 100%
• Environment condition : Dark room in the non outside light
• Video menu option condition
1) In non-impressed condition, measure peak brightness displayable as much as possible LCD module.
2) Measuring instrument: CA-210 or a sort of Color Analyzer.
3) Pattern Generator :VG- 828 or a sort of digital pattern generator (displayable Full White &1/25 White Window pattern)
4) Measure condition
• Test pattern: in center,1/5(H)*1/5(V) of Window Pattern (white pattern in non-impressed condition)
• SET condition: Contrast &Brightness Level 100%
• Environment condition : Dark room in the non outside light
• Video menu option condition
5) Measurement
• Do heat-run LCD module at 30minutes in normal temperature (25°C)by using full white pattern of 15%signal level(38 gray level).
• Impress test pattern signal in 1/5(H)*1/5(V)White Window of 100%(255Gray Level)
• measure 3 times brightness of central white window,and mark peak brightness in max brightness degree
• measure the same condition in video signal /RGB signal.
• Do heat-run LCD module at 30minutes in normal temperature (25°C)by using full white pattern of 15%signal level(38 gray level).
• Impress test pattern signal in 1/5(H)*1/5(V)White Window of 100%(255Gray Level)
• measure 3 times brightness of central white window,and mark peak brightness in max brightness degree
• measure the same condition in video signal /RGB signal.
- Luminance uniformity measure specification
1) Impress 100%(255Gray Level) full white pattern at the same peak brightness measurement.
2) Measure average brightness in 5 points.
1) Impress 100%(255Gray Level) full white pattern at the same peak brightness measurement.
2) Measure average brightness in 5 points.
Signal
Picture Mode
Dynamic Contrast
Dynamic Color
Black Level
RF
NTSC-M
Vivid
High High Low
AV NTSC-J Vivid
High
High High
Component 720P
Vivid
High
High
High
RGB 1024x768
Vivid
NA
NA
NA
HDMI DTV
720P
Vivid
High
High
Low
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