User Manual

LCD12864-COG
5. Inspection Standards
Item Criterion for defects Defect type
1) Display on inspection
(1) Non display (2) Vertical line is deficient
(3) Horizontal line is deficient (4) Cross line is deficient
Major
2) Black／White spot
Size Φ(mm) Acceptable number
Φ≤0.3 Ignore (note)
0.3<Φ≤0.45 3
0.45<Φ≤0.6 1
0.6<Φ 0
Minor
3) Black／White line
Length (mm) Width (mm) Acceptable number
L≤10 W≤0.03 Ignore
5.0≤L≤10 0.03<W≤0.04 3
5.0≤L≤10 0.04<W≤0.05 2
1.0≤L≤10 0.05<W≤0.06 2
1.0≤L≤10 0.06<W≤0.08 1
L≤10 0.08<W follows 2) point defect
Defects separate with each other at an interval of more than 20mm
Minor
4) Display pattern
A+B≤0.28 0<C D+E≤0.25 F+G≤0.25
2 2 2
Note: 1) Up to 3 damages acceptable
2) Not allowed if there are two or more pinholes every three-fourth inch.
Minor
5) Spot-like contrast
irregularity
Size Φ(mm) Acceptable Number
Φ≤0.7 Ignore (note)
0.7<Φ≤1.0 3
1.0<Φ≤1.5 1
1.5<Φ 0
Note: 1) Conformed to limit samples.
2) Intervals of defects are more than 30mm.
Minor
6) Bubbles in polarizer
Size Φ(mm) Acceptable Number
Φ≤0.4 Ignore (note)
0.4<Φ≤0.65 2
0.65<Φ≤1.2 1
1.2<Φ 0
Minor
7) Scratches and dent on the
polarizer
Scratches and dent on the polarizer shall be in the accordance with “2)
Black/white spot”, and “3) Black/White line”.
Minor
8) Stains on the surface of
LCD panel
Stains which cannot be removed even when wiped lightly
with a soft cloth or similar cleaning.
Minor
9) Rainbow color
No rainbow color is allowed in the optimum contrast on state within the active
area.
Minor
10) Viewing area
encroachment
Polarizer edge or line is visible in the opening viewing area due to polarizer
shortness or sealing line.
Minor
11) Bezel appearance Rust and deep damages that are visible in the bezel are rejected. Minor
12) Defect of land surface
contact
Evident crevices that are visible are rejected. Minor
13) Parts mounting
(1) Failure to mount parts
(2) Parts not in the specifications are mounted
(3) For example: Polarity is reversed, HSC or TCP falls off.
Minor
14) Part alignment
(1) LSI, IC lead width is more than 50% beyond pad outline.
(2) More than 50% of LSI, IC leads is off the pad outline.
Minor
15) Conductive foreign
matter (solder ball,
solder hips)
(1) 0.45<Φ, N≥1
(2) 0.3<Φ≤0.45, N≥1, Φ: Average diameter of solder ball (unit: mm)
(3) 0.5<L, N≥1, L: Average length of solder chip (unit: mm)
Minor
16) Bezel flaw Bezel claw missing or not bent Minor
17) Indication on name plate
(sampling indication label)
(1) Failure to stamp or label error, or not legible.(all acceptable if legible)
(2) The separation is more than 1/3 for indication discoloration, in which the
characters can be checked.
Minor
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