47LB2DE (CHASSIS:LB61D) - LG TV Service Manual (repair manual). Page 8

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5-2. 42LB2DE

No

Item

Min

Typ

Max

Unit

Remark

1.

White peak Brightness 

400

500

cd/m

2

(Center 1-point/Full White Pattern)

2.

White average brightness

cd/m

2

3.

Brightness uniformity

80

%

4.

Color coordinate

RED

X

Typ

0.638

Typ

Y

- 0.03

0.340

+ 0.03

GREEN

X

0.279

Y

0.611

BLUE

X

0.146

Y

0.062

WHITE

X

0.272

(Standard)

Y

0.278

5.

Contrast ratio

1100:1

1600:1

- Full white(100IRE)

- Full black(0IRE)pattern

- Picture:Dynamic(Cool)

- Input : TV/DTV/AV1,2

Comp1,2/RGB/HDMI1,2

Medium

8,300

9,300

10,300

Cool

11,000

12,000

13,000

Warm

5,500

6,500

7,500

6.

Color Temperature

10.0

%

<Test Signal>

HDMI Input,

85% Full white pattern

7.

Color Distortion, DG

10.0

deg

8.

Color Distortion, DP

43.0

dB

9.

Color S/N, AM/FM

-80

dBm

10.

Color Killer Sensitivity

# White Peak brightness measure specification
1) In non-impressed condition , measure peak brightness
displayable as much as possible LCD module.
2) Measuring instrument : CA-110 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 

5) Measurement

- Do heat-run LCD module at 30 minutes in normal

temperature (25°C) by using full white pattern of 15%
signal level(38 gray)

- 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.

1) Impress 100%(255Gray Level) full white pattern at the

same peak brightness measurement.
2) Measure average brightness in 9 points. 

1) Test display signal : 30*30 dots White Window signal & all

Black Raster signal

2) Dark room measure condition : Using touch type Color

analyzer CA-100 Dark room in the non outside light 

3) Bright room measure condition : In bright room of 150Lx
illumination in the panel surface, locate a source of light on the
above 45° of the panel surface.
4) Measure method

- In standard test condition, impress 30*30 dots White

Window Pattern signal .

Measure center peak brightness degree Lw of white
window

- Impress black Raster signal as contrast ratio

measurement signal.

Measure black brightness degree Lb of PDP central 
Calculate the following numerical formula .