Velleman MONSCA4N Instrukcja Użytkownika Pobierz pdf (Strona 3)

Information sheet

Velleman

3/3 Last update: 25/05/2010

4. Procedure

Inspection conditions

• Viewing distance is approximately 35 ~ 40 cm (for

inspecting adjacent dots and distance between defect

dots, this distance is much closer)

• Viewing angle is normal to the LCD panel (max. 10°

deviation)

• Ambient temperature is 25 ± 5°C

• Ambient humidity is 60 ± 5% RH

• Ambient illuminance is between 300 ~ 500 Lux.

• Input signal timing should be typical value.

A eye position

B LCD panel

Inspection criteria

Refer to the definitions in §2.

N = number of defects.

defect type limit

visual

defect

scratch

0.03mm ≤ W ≤ 0.1mm

L ≤ 10mm

N ≤ 4

defect

round 0.3mm ≤ Ø ≤ 1.0mm N ≤ 5

linear

W ≤ 1.0mm

L ≤ 3.0mm

N ≤ 5

polarizer 0.3mm ≤ Ø ≤ 1.0mm N ≤ 5

total allowed N ≤ 10

electrical

defect

single dot

bright* N ≤ 6

dark N ≤ 6

total allowed N ≤ 9

adjacent dots 2** ≤ 3 pairs

3** ≤ 2 sets

4** ≤ 1 sets

distance between 2 bright dots ≥ 10mm

line defects N = 0 (not allowed!)

*: visible through a 5% ND (Neutral Density) filter

**: adjacent dots also add to the single dot counter

Note: other defects that may occur e.g. mura are subject to user interpretation and should be

evaluated individually.

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