1. Product Specification (continued)
ACER X193HQ |
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1.4.5.5 Defect Terminology | 1.5 Optical Characteristics | |
Table 3 gives the descriptive terms used in classifying | Depends on the LCD supplier's spec. Details refer to QA | |
defects. |
| Inspection Spec. |
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| S p o t s o r l i n e s t h a t a p p e a r d a r k i n t h e d i s p l a y p a t t e r n s a n d a r e |
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| u s u a l l y t h e r e s u l t o f c o n t a m i n a t i o n . D e f e c t s d o n o t v a r y i n |
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D a r k / S p o t s / L i n e s | s i z e o r i n t e n s i t y ( c o n t r a s t ) w h e n c o n t r a s t v o l t a g e i s v a r i e d . |
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| C o n t r a s t v a r i a t i o n c a n b e a c h i e v e d t h r o u g h t h e u s e o f v a r y i n g |
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| g r a y s h a d e p a t t e r n s . |
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| S p o t s o r l i n e s t h a t a p p e a r l i g h t i n t h e d i s p l a y p a t t e r n s . |
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B r i g h t S p o t s / L i n e s | D e f e c t s d o n o t v a r y i n s i z e o r i n t e n s i t y ( c o n t r a s t ) w h e n |
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c o n t r a s t v o l t a g e i s v a r i e d . C o n t r a s t v a r i a t i o n c a n b e a c h i e v e d |
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| t h r o u g h t h e u s e o f v a r y i n g g r a y s h a d e p a t t e r n s . |
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| W h e n t h e u n i t l i g h t s , l i n e s a p p e a r l i g h t ( w h i t e ) w i t h d i s p l a y |
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P o l a r i z e r S c r a t c h | p a t t e r n s d a r k a n d d o n o t v a r y i n s i z e . P h y s i c a l d a m a g e t o t h e |
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| p o l a r i z e r t h a t d o e s n o t d a m a g e t h e g l a s s |
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| W h e n t h e u n i t l i g h t s , s p o t s a p p e a r l i g h t ( w h i t e ) w i t h d i s p l a y |
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P o l a r i z e r D e n t | p a t t e r n s d a r k a n d d o n o t v a r y i n s i z e . P h y s i c a l d a m a g e t o t h e |
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| p o l a r i z e r t h a t d o e s n o t d a m a g e t h e g l a s s . |
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| H o r i z o n t a l o r d i a g o n a l l i n e s t h a t a p p e a r g r a y w i t h t h e d i s p l a y |
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R u b b i n g L i n e | p a t t e r n s d a r k a n d m a y h a v e r e s u l t e d f r o m a n “ o u t o f c o n t r o l ” |
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r u b b i n g p r o c e s s o n t h e p o l y i m i d e o r “ w a v e s ” o n t h e B E F s o r |
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| p r i s m s h e e t s . |
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N e w t o n R i n g | T h e “ r a i n b o w ” e f f e c t c a u s e d b y n o n - u n i f o r m c e l l t h i c k n e s s . |
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| W h e n t h e u n i t l i g h t s , v a r i a t i o n / n o n – u n i f o r m i t y |
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M o t t l i n g | ( s p l o t c h i n e s s ) a p p e a r s l i g h t ( w h i t e ) w i t h t h e d i s p l a y a n d |
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| m i g h t v a r y i n s i z e . |
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D i m L i n e | W h e n t h e u n i t l i g h t s , l i n e ( s ) i n t h e m o n i t o r ( v e r t i c a l ) o r m a j o r |
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( h o r i z o n t a l ) a x i s a p p e a r d i m , b u t n o t c o m p l e t e l y o n o r o f f . |
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C r o s s L i n e s O f f | W h e n t h e u n i t l i g h t s , l i n e s i n b o t h t h e m i n o r a n d m a j o r a x i s |
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d o n o t a p p e a r . |
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B r i g h t / D a r k D o t | A s u b – p i x e l ( R , G , B d o t ) s t u c k o f f / o n ( e l e c t r i c a l ) . |
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1.4.5.6Smudges, Streaks and Smears
When viewing the panel oriented so as to maximize reflected light , there shall be no visible smudging , streaking, smearing or other nonuniformity from contaminants ,fingerprints,or defects in any of the visible surfaces. This is independent of whether the unit is operating or off .
1.4.5.7Other Defects
Undefined defects that are considered to be rejectable by
1.4.5.8LCD Inspection
Put LCD panel on inspection table and illuminate the panel with a daylight fluorescent lamp located above the panel surface such that the luminance at the LCD panel is between 1000 lux and 1500 lux .Defect limits are given in Table 4 .
Average Diameter smaller of | Acceptable Number | Minimum Separation | |
(L+W)/2 or L/20+2W | |||
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< 0.1mm | Non countable | N / A | |
0.1 mm ~ 0.3 mm | 10 | 15 mm | |
0.31 mm ~ 0.5 mm | 10 | 15 mm | |
0.51 mm ~ 1.25 mm | 5 | 15 mm | |
1.26 mm ~ 2.5 mm | 3 | 25.4 mm | |
2.51 mm ~ 3.75 mm | 3 | 25.4 mm | |
Greater than 3.75 mm | NONE | Not applicable |
Note : Allowable distance between spots of two sizes is the minimum separation
number for the smaller spot. Therefore, if there are two spots, 1.30mm and 0.4mm
in diameter, they must be at least 15mm apart.
