External Inspection On The Lcd Module; Inspection Conditions; Electrical Inspection Specification - NEC MultiSync LCD1970NX Service Manual

3. External Inspection on The LCD Module

3.1 Inspection Conditions

1. Room temperature: 20-25°C
2. Humidity: 65 ±5%RH
3. Illumination: Single 20W fluorescent lamp non-directive (Appearance 300 ~ 700 Lux, Display 180 ~
200Lux)
4. To be a distance about 35 cm in front of LCD unit, viewing line should be perpendicular to the surface of
the module judge the visual appearance with human's eyes.
5. Take off the protector of polarizer while judging the display area.
6. If there is any question while judging, check the panel again while operating

3.2 Electrical Inspection Specification

Item
(1)
(2)
Adjacent Dots
(3)
(4)
Dot Defect (5)
(6)
(7)
Min. Distance
between bright
dots
(8)
Total amount of Bright Dot (R, G, B) and Dark Dot (R, G, B)
Total amount
of Dot Defects
Total amount of Bright Dot (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.
Bright dots Horizontally adjacent 2 dots (R+G,
G+B)
Dark dots
Horizontally, vertically or combined
Bright dots
adjacent 3 dots
(Separately bright dots and dark
Dark dots
dots)
Dot defects except
R or G or B (Bright Dot + Dark Dot)
(1) and (2)
Distance between Distance between bright dots (R -
bright dots R): less than 5.9mm
Distance between Distance between (6) s: less than
(6)'s 9mm
Two or more pixels or sub-pixels
with more than one fault of (5).
Two or more pixels or sub-pixels
Fault cluster
with more than one fault of (1).
Two or more pixels or sub-pixels
with more than one fault of (2).
Criteria
5-6
Remar
Max. 3 Note 1
Max. 3 Note 2
Not Allowed
Note 3
Not Allowed
Max. 7 Note 4
Max. 2 for each
Note 5
color
Not Allowed Note 6
Max. 3 Note 7
Not Allowed Note 8
Max. 13 -
Max. 4 -