5-7
Dot Defect
(1) Definition
a) Bright dot
The sub-pixel can be seen when using the 5% ND-Filter.
b) Scratches on the color filter (Bright dot count)
Count: defect area > 1/4 dot
No count: defect area < 1/4 dot
(2) Bright dot (Acceptable)
Green/Red/Blue dots: When the MODULE lights, dots appear bright in display at black picture. (V0)
2 adjacent ….. 1 pair MAX
Green Bright dots 2 adjacent ….. Nothing
Defect distance ….. more than 10mm
(3) Black dots (Acceptable)
Black dots: When the MODULE lights, dots appear black in display at Green + Blue + Red picture.
Two adjacent dots ….2 pair MAX
Defect distance ….. more than 5mm
Three joined bright dots must be nil
(4) Total dot defect (Black & Bright)
Display non-uniformity / Mura
There should be no distinct non-uniformity/ Mura visible through 5% transparency of filter.
Note: To make the special standard for the high percentage mura. Specification as the following list
Check pattern Total Quantity
Black picture
≤ 3
Check pattern Total
Green + Blue + Red Picture
Three picture position
total 5 MAX
Check pattern Total Quantity
N/A 5 MAX
Mura Type Inspection criteria Inspection method
Edge mura ND filter 8%
Per Gray scale 32 pattern (not limited in each
Gray scale pattern)
Spot mura ND filter 8% Per Each Gray scale pattern
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