Confidential
4-4
ML300
6. Focus Test
Procedure
- Test equipment: video generator
- Test signal:1280�800��0Hz
1280�800��0Hz
- Test Pattern: Full screen
Inspection Distance - 0.8M~1M
Inspection item
- Focus check
Criteria
- From screen 1M via visual to check focus, look at the
entire screen, focus shall be clear,crisp and sharp over
the entire surface of the display pattern. (Blur word
on one of thecorner after adjustment is acceptable.
However, the word should at least be recognizable.)
Unbalance - After adjust the lens ,if the diagonal or adjacent two
grids vague,it will be regarded as” NG”
Full Screen
Order
Symptom
Pattern
Criteria
Bright pixel ( dots)
Gray 10 pattern
A=0
2
Dark pixel(dots)
White pattern
A ≤ 4
3
Bright blemish
Any pattern
Blemishes are allowed
4
Dark Blemish
Any pattern
Blemishes are allowed
5
Bright dot on frame
Gray 10 pattern
≤ 1
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Unstable pixel
Any pattern
A = 0
7
Adjacent dark pixel
Any pattern
A = 0
Pixel specification
