NEC MultiSync LCD1550ME Service Manual page 72

Visual Defect
Electrical defect
*1) W: Width, L: Length, N: Number
*2) Definition of Adjacent
*3) Bright dot is defined as follows:
Dark dot is defined as follows:
Defect type
Scratch
Dent
Block spot
Lint
Newton rings
Bright dot
Dark dot
Total dot
Two adjacent dot
Bright dot
Dark dot
Three or more adjacent dot
Distance between defects
Bright dot
Dark dot
Line defect
R G B R G B R G B
R G B R G B R G B
R G B R G B R G B
≥ 1/3 area of sub-pixel
≥ 1/3 area of sub-pixel
0.01mm ≤ W ≤ 0.05mm
L ≤ 10mm
0.01mm ≤ W
10mm < L
0.05mm < W
0.15mm ≤ Φ ≤ 0.4mm
0.4mm < Φ
0.15mm ≤ Φ ≤ 0.5mm
0.5mm < Φ
L ≤ 3mm
3mm < L
5-21
Limit
N ≤ 4
N = 0
N = 0
N ≤ 4
N = 0
N ≤ 4
N = 0
N ≤ 4
N = 0
Not allowed
N ≤ 4 (Green:4)
N ≤ 4
N ≤ 4
≤ 2 pairs
≤ 2 pairs
No allowed
≥ 15mm
≥ 15mm
No allowed
Defective pixel
Adjacent pixel