5-4
2. External inspection on the LCD module
Inspection condition is approximately 15-50cm
Viewing angle is normal to the LCD panel.
Ambient temperature is in the room temperature.
Ambient illumination is 300-500Lux.
Display characteristics
Defect type Criteria
Dark / Bright Spot
Circular Foreign Material
0.2mm≤D<0.5mm
N≤4
Bright or Dark Line
Foreign Material
0.05mm≤W<0.2mm
0.3mm≤L≤3mm
N≤4
Polarizer / Linear Scratch
0.01mm≤W<0.2mm
1.0mm≤L≤10mm
N≤3
Polarizer – bubble / Peeling
0.15mm≤D<0.25mm
N≤4
Visual defect
D: Diameter
N: Number
W: Horizontal width
L: Vertical high
Maximum Allowable Defect
Count All Types
N≤7
Bright Dot Random
N≤4
Bright Dot 2 Adjacent
N≤2
Dark Dot Random
N≤4
Dark Dot 2 Adjacent
N≤3
Dark Dot 3 or More Adjacent N=0
Total Bright and Dark Dots
N≤4
Minimum Distance Between Bright Dots
≥15mm
Minimum Distance Between Dark Dots
≥10mm
Electrical defect
N: Number
Minimum Distance Between Bright Dots
and Dark Dots
≥10mm
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