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Table 7-2 Screen Defect Criteria and Inspection Conditions
Defect Item
Criteria
Conditions
Projection Image
High
Bright
Spot
Refer to Table 7-1.
Consecutive two or
more high bright spots
should not be
acceptable.
Count 75% or more white
spot. (All black and/or gray-
scale projection produces this
defect. The defect of 5% or
more translucent state at all
white projection.)
VG-Prog. No.856
All black: [Image
OFF]
75% white:
[GRAY]
Low
Bright
Spot
Refer to Table 7-1.
Consecutive two or
more low bright spots
should not be
acceptable.
Count 50% or more white
spot. (All black and/or gray-
scale projection produces this
defect. The defect of 2.5% to
5% translucent state at all
white projection.)
All black: [Image
OFF]
50% white:
[WINDOW]
Ignored
Bright
Spot
Ignore.
Bright spot which is darker
than 50% white. (All black
and/or gray-scale projection
produces this defect. The
defect of less than 2.5%
translucent state at all white
projection.)
All black: [Image
OFF]
50% white:
[WINDOW]
Blinking
Spot
The same category as
the high bright spot.
Count 75% or more white
spot. (All black and/or gray-
scale projection produces this
defect. The defect of blinking
spot of a picture element.)
All black: [Image
OFF]
75% white:
[GRAY]
Dot
Defect
Dark Spot
Refer to Table 7-1.
Consecutive two dark
spots should be
acceptable, but three or
more should not.
Project 100% white image
and count a black spot. (All
white projection produces
this defect. The defect that a
75% or more area of the
element has no transparency.)
All black: [Image
OFF]
100% white:
[COLOR]
Consecutive Pixel
Defect
Refer to Table 7-1.
Project alternate black- white
stripe pattern. (Horizontal
stripe pattern projection
produces this defect. The
defect of an all black spot of
a picture element on the
white pattern and/or an all
white spot of a picture
element on the black
patterns.)
Stripe pattern:
[CROSS]
Line Defect
(Electrostatic
Breakdown)
There should be no
chipped line defect.
Project 100% white image
and all black image. (Defect
of a 100% transparent line
and/or a not transparent line
at all white, all black or gray-
scale projection)
All black: [Image
OFF]
100% white:
[COLOR]
