BenQ G2450HM, Service Manual, Page: 22 / 99

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Major defects: A major defect is a defect that is likely to result in failure, or to reduce materially the usability of the
product for its intended purpose. Minor defects: A minor defect either is a defect that is not likely to reduce materially
the usability of the product for its intended purpose, or is a departure from an established having little bearing on the
effective use or operation of the product.
6.1 Electrical inspection specification
Inspection Item Specification
1 Line defect Can’t be seen.
2 Bright dots ≤ 2 dots (Note1, 4)
3 Dark dots ≤ 5 dots
4 Total dots defect ≤ 5 dots
5
Adjacent dot defect
(Note 1, 2, 3)
Two continuous bright dots (vertical, horizontal, oblique): ≤ 1 pair
Three or more continuous bright dots (vertical, horizontal, oblique):
Not allowed
Two continuous dark dots (vertical, horizontal, oblique): ≤ 2 pair.
Three or more continuous dots – to be of any combination of dark dot
and bright dot (vertical, horizontal, oblique): Not allowed
Distance between 2 Bright dots: ≥ 15 mm
Distance between 2 Dark dots: ≥ 15 mm
Distance between Bright and Dark dots: ≥ 15 mm
6
Display non-uniformity
Or Mura (Note 5,6)
Use 8% ND filter or judged by equivalent limit sample
Note 1: For bright dot defect, bright area should be larger than 1/2 area of a sub-pixel to be count as 1 dot defect. A
dot defect that is smaller than the defined dot defect will be treated as small bright dot.
The drawing of 1/2 area sub-pixel definition: The 1/2 area sub-pixel can be defined as below one or more of specific
shapes (Fig.1).
Fig.1 Fig.2
All bright dot defects should not be noticeable by observer under specified inspection environment (Please refer to
item 5).
Note 2: (Fig.2) Adjacent-dot defect (refer to picture, dot 1,2,..,8 around A are all A’s adjacent dots) should be
inspected under the same display pattern in any one of White /Black /Red /Green /Blue /Monotone Gray pattern.
Note 3: Adjacent-dot defect should be observed under any one of White /Black /Red /Green /Blue pattern. 1 pair of
bright dots equals 2 dots. Inspection patterns: Standard inspection patterns of dot defect are listed below. AUO uses
these patterns as standard criteria for judging dot defect. Please inform AUO if any other pattern is to be used to
examine dot defect.