Identification Criteria For The Bright Spot And Dark Spot Of The Lcd Screen - Prima LC-20S3 Service Manual

Identification criteria for the bright spot and dark spot of the LCD screen

Category criteria
One single
spot
Bright Two
spot neighboring
spots
Total No.
One single
spot
Dark
Two
spots
neighboring
spots
Total No.
Total defected point
Notes:
1. Definition of defected point (bright spot, dark spot): It is identified as a defected point if its area
exceeds 1/2 of a single picture element (R, G, B).
2. Definition of bright spot: It is identified as a bright spot if it is bright in the state of dark field and its
bright size remains unchanged
3. Definition of dark spot: It is identified as a dark spot if it is dark in the state of white field and its
dark size remains unchanged
4. Definition of two neighboring points: Defects of a group of picture elements (RB,RG,GB).
quantity allowed
15" 20" 22"
≤5 ≤2 ≤5
≤2 ≤1 ≤2
≤5 ≤2 ≤5
≤6 ≤7 ≤5
≤2 ≤2 ≤2
≤6 ≤7 ≤5
≤8 ≤7 ≤5
30" 40" 15"
≤2 ≤3
≤1 ≤1
≤2 ≤3
≥15mm
≤4 ≤10
≤1 ≤5
≤4 ≤10
≤4 /
15
Distance between two spots
20" 22" 30"
≥15mm
≥10mm ≥5mm
40"