Inspection Condition Condition - NEC MultiSync 20WGX2 Service Manual

7. External Inspection on the LCD Module 7. External Inspection on the LCD Module
7.1 Inspection Condition 7.1 Inspection Condition
7.1.1 Conditions 7.1.1 Conditions
Ambient conditions : Ambient conditions :
a. T a. Temperature : emperature : 20~25 20~25
b. b. Humidity Humidity : : 65 65 +/-
c. Ill c. Illumination umination : Si : Single 20W fluoresce
Viewing distance : Viewing distance :
The distance between the LCM and the inspector The distance between the LCM and
Viewing Angle : Viewing Angle :
The inspection shall be conducted within normal viewing angle range. The inspection shall be conducted within normal viewing angle range.
Refer to the CAS for viewing angle) Refer to the CAS for
7.1.2 Dot Defect 7.1.2 Dot Defect
7.1.2.1 Bright Dot 7.1.2.1 Bright Dot
Dots (sub-pixels) Dots (sub-pixe ls) which appeared bright
pattern. pattern.
-R,G or B -R,G or B 1 1 dot dot ----------------------------------------- ----------------------------------------- 2 Max (BDF 9
-Adjacent -Adjacent 2 2 dots dots ---------------------------------------
-Adjacent 3 3 dots -Adjacent dots ---------------------------------------
-T -Total a otal amount o mount of Bright f Bright dots ----------
-Bright -Bright dot dot density density -----------------------
* Small bright dot which can be seen * Small bright dot which can be seen on 64 gray pattern is to be counted asone
dot defect. (Max N dot defect. (Max N
<R,G,B <R,G,B 1/2) 1/2)
≦ ≦
7.1.2.2 Dark Dot 7.1.2.2 Dark Dot
Dots(sub-pixels) which appeared darkly in the screen when the LCM displayed with bright Dots(sub-pixels) which appeared darkly in the screen when the LCM displayed with bright
pattern. pattern.
-R,G or B 1 dot -------- -R,G or B 1 dot --------------
-Adjacent -Adja cent 2 2 dots dots ---------------------------------------- ---------------------------------------- 2 Max
-Adjacent -Adja cent 3 3 dots dots ---------------------------------------- ---------------------------------------- 0 Max
-T -Total otal a a mount of mount of Dark Dark dot ----------------------------
-Dark dot -Dark dot density density ---------------------------------------
7.1.2.3 Total a 7.1.2.3 T otal amount of Dot mount of Dot Defects ------
Not Note) e) a. Every dot here a. Every dot herein mean
b. Damaged less than half size of sub-pixel is not counted as defect. b. Damaged less than half size of sub-pixel is not counted as defect.
c. Dots darker than half brightness of sub-pixel are not defined as bright dot defectand dots brighter c. Dots darker than half brightness of sub-pixel are not defined as bright dot defectand dots brighter
than hal than half brightness of sub-pixel is f brightness of sub-pixel is not defined as dark dot defect.
o o C C
+/- 5 5 % % RH RH
ngle 20W fluorescent lamp nt lamp non-directive
(Appearance - 300 to 700 Lux , Display (Appearance - 300 to 700 Lux , Display
the inspector
viewing angle)
which appeared brightly ly in the screen when
--------------------------------------- 0 Max
--------------------------------------- 0 Max
dots ----------------------- ------------- 2 2 Max
------------------------------------- -------------- Wi
on 64 gray pattern is to be counted asone small bright
≦ ≦ 3 within 10mm*10mm, T 3 within 10mm*10mm
------------ ------------ ----------- ----------- -----------
dot ---------------------------- 6 Max
--------------------------------------- Wit
Defects ----------- ------------ ------------
in means Sub-Pixel. (Ea s Sub-Pixel. (Each Red,Green, or Blue C
not defined as dark dot defect.
non-directive
– – 180 to 200 Lux) 180 to 200 Lux)
' ' s eyes shall be at least 35cm. s eyes shall be at least 35cm.
in the screen when the LCM displayed the LCM displayed with dark
2 Max (BDF 95%) 5%)
0 Max
0 Max
Max
Within thin 10 mm 10 mm
Φ Φ
, Total Max N otal Max N ≦ ≦ 8) Size of small 8) Size
----- 5 5 Max Max
2 Max
0 Max
6 Max
Within hin 10 mm 10 mm
Φ Φ
---------- 8 Max (Combination) ----- 8 Max (Combination)
ch Red,Green, or Blue Color)
5-17 5-17
with dark
small bright
of small bright dot bright dot (1/20 (1/20
olor)