NEC Multi Sync EA221WM Service Manual page 46

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5.5.3 For LGD panel (LM220WE1-TLP1 GZ LGD)
Ambient conditions
a. Temperature: 20-25 degreeC
b. Humidity: 65±5 % RH
c. Illumination: Single 20W fluorescent lamp non-directive
(Appearance – 300 to 700 Lux, Display – 180 to 200 Lux)
Viewing distance
The distance between the LCM and the inspector's eyes shall be at least 35cm
Viewing Angle
The inspection shall be conducted within normal viewing angle range.
* Refer to the CAS for viewing angle.
Defect Modes
Bright dot
R, G or B 1dot ------------------------------------------------------------------------------- 2 Max (BDF 95%)
Adjacent 2dots ------------------------------------------------------------------------------ 0 Max
Adjacent 3dots ------------------------------------------------------------------------------ 0 Max
Total amount of Bright dots -------------------------------------------------------------- 2 Max
Bright dot density --------------------------------------------------------------------------- Within Φ15mm
*Small bright dot which can be seen on 64 gray pattern is to be counted as one small bright dot defect. (MaxN≤2
within 15mm*15mm,Total Max N≤8) SIZE OF small bright dot(1/29<R,G,B≤1/2)
Dark dot
R, G or B 1dot ------------------------------------------------------------------------------- 5 Max
Adjacent 2dots ------------------------------------------------------------------------------ 2 Max
Adjacent 3dots ------------------------------------------------------------------------------ 0 Max
Total amount of Bright dots -------------------------------------------------------------- 7 Max
Bright dot density --------------------------------------------------------------------------- Within Φ15mm
Total amount of Dot Defect
Total amount of Dark Defects ----------------------------------------------------------- 9 Max (Combination)
Note) a. Every dot herein means Sub-Pixel (Each Red, Green, or Blue Color)
5-8

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