Akai PDP4273MN Service Manual page 49

*4 Contrast r a t i o with the display r a t i o of l ° o i s for a reference. Contrast r a t i o i s calculated from the following equation .
C on trast =
*5 The c hr omaticity measurement pattem i s t he same a s t h e c l i r o n i a t i c i t y uniformity measurement pattem shown a t Display Quality
p ar agraph.
*6 Streakmg measurement pattem i s shown a s below.
Streaking i s defined as following e q u a t i o n , however t h i s value i s not managed i n d i e f a c t o r . ' .
( L u m i n a n c e a t s i ) - ( L u m i n a n c e a t S2)
--------------------------------------
Streaking =
Pixel row 1
Pixel row 2
Pixel row
Pixel row 4
Pixel row
Pixel row
Pixel row 1.019
Pixel row 1.020
Pixel l ow 1.02:
Pixel row 1.022
Pixel 1.023
low
Pixel row 1.02—
A v e r a g e d L u m in an ce o f the 9 -lo catio n s ( 10 % )
A ll black Luminance
( L u m i n a n c e a t S i )
P isel P ixe l P ixe l
ffiT iirm co lu m n co lu m n
3
I 2
Pixel wLtch (horizontal)
Ü. 9 Omni
R G 3
R G 3
~
R G 3
3
R G 3
R G 3
R G
6
3
R G 3
R G 3
R G 3
R G 3
R G 3
R G 3
pHp A3 pANE|_ DATASHEET
X 1 0 0 %
P isel
co lu m n c-o lu im co lu m n
1022
Sub pLMsl pitch ( h o r i z o n t a l )
Ü J O iiu ii
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
R G B R G B
F i g u r e 2. D i s p l a y P i x e l F o r m
4 6 / 6 0
H 10 3HT0 2H-10 3H/10
:>
k
2Y/10
Y/10
4Y.-10
Y'10
2 V . 1 0
Streaking measurement pattern
F ix e ^ P ixe l
1 0 2 3 1 0 2 4
Sub pixel
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
R G 3 R G B R G 3
H 10
> k — >
Pixel