External Inspection On The Lcd Module; Inspection Condition; Standards For Display Conditions - NEC LCD1501-BK Service Manual

Lcd1501 series
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5. External inspection on the LCD module

5.1 Inspection condition

1) Ambient temperature is approximately 20~25°C.
2) Ambient humidity is approximately 65 ±.
3) Ambient illuminant is from 300 to 700lux.
4) Viewing distance is approximately 35cm.
5) Viewing angle : right and left 30°, top and bottom 20° ~ 0°.

5.2 Standards for display conditions

Standard for errors (defects)
Joined
(1) Continuous 2 bright dots
defects
(2) Continuous 2 black dots
(3) Continuous 3 or more bright
dots
(4) Continuous 3 or more black
dots
Dot defect
(5) Dot defects other than (1) and
(2)
Defective
(6)
Adjacent to same-color
proximity
bright-dot defect
(7)
Approach of adjacent defects
of (6)
(8)
Defect cluster
Total No.
Total No. of bright dots (R.G.B) + black dots (R.G.B)
of defects
Total No. of bright points in G
Note 9. Every dot herein means sub-pixel (each Red, Green or Blue color)
Note 10. Bright & Dark Dots are larger than one third of sub-pixel. (Dots smaller than one third of sub-pixel
are not counted as a defect dots.)
Note 11. Do not use the [ND] filter in counting a bright dot.
Item
Standard
R+G, 2 continued
horizontally
Both the same color
and different colors
are counted.
R.G.B (Black dot +
Bright dot)
Distance between
defects ≤ 6.5mm
Distance of approach
≤ 15mm
A set of 2 or more dot
defects in an area of
5×5 pixels
[(5) in consideration]
Approach of adjacent
defects of (1) in an
area of 5×5 pixels
Approach of adjacent
defects of (2) in an
area of 5×5 pixels
5-9
≤ 2 pairs
≤ 2 pairs
≤ 0 pair
≤ 0 pair
≤ 4
Each color ≤ 2 pairs
≤ 0 pair
≤ 2 clusters
≤ 0 pair
≤ 4
≤ 4
Remarks
Note 1
Note 2
Note 3
Note 4
Note 5
Note 6
Note 7
Note 8
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