NEC MultiSync LCD1525V Service Manual page 56

2. Appearance of LCD and Display inspection standard
2.1 Dot defect
2.1.1 Bright Dot
Bright dot is defined as dots(sub-pixels) which appeared brightly in the screen when the LCM displayed with
dark pattern.
• R, G or B 1 dot ----------------------------
• Adjacent 2 dots ---------------------------
• Adjacent above 3 dots ------------------
• Total amount of Bright dots ------------
• Minimum distance between dots -----
2.1.2 Dark Dot
Dark dot is defined as dots(sub-pixels) which appeared darkly in the screen when the LCM displayed with
brigt pattern.
• 1 dot -----------------------------------------
• Adjacent 2 dots ---------------------------
• Adjacent above 3 dots ------------------
• Total amount of Dark dot ---------------
• minimum distance between dots -----
2.1.3 Total amount of Dot Defects ------------
NOTE: a. Every dot herein means Sub-pixel(each Red, Green or Blue Color).
b. Bright & Dark dots are larger than half sub-pixel. (Dots smaller than half sub-pixel are not counted as
defect dots)
2.2 Polarizer Defects
Scratch
Dent
NOTE: D: Average Diameter
W: Width,
Linear: a>2b,
Unit: mm
a. Extraneous substances that can be wiped out like Finger Print,
Particles are not considered as a defect.
b. Defects which is on the Black Matrix(outside of Active Area)
are not considered as a defect.
Items
Linear
Circuar
D=(a+b)/2
L: Length,
Circular: a<2b
6 Max.
2 Max.
Not allowed.
8 Max.
15mm
6 Max.
2 Max.
Not allowed
8 Max.
15mm
10 Max.(including bright & dark dot defects)
Criteria
0.05 ≤ W ≤ 0.2, 5.0 ≤ L ≤ 10.0, N ≤ 4
0.2 ≤ D ≤ 0.5, N ≤ 6
N: Quantity
5-4
b
a