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8) As shown above, output the VDP Test Pattern sig-
nal(208/192/176/160/144/128/112/96/80/64/48/32/16) and
change the RGB Data value of each step to come out
white balance x=283, y=297(D9300K) and measured
lumincance in 3).
(5) Gamma adjustment manually
This is adjustment(after finish the 3-4) to check whether
Gamma/White Balance adjustment are well adjusted and
make correction manually.
1) Prepare the PC Pattern Generator which is possible to out-
put R/G/B of 16 step and 64 step Gray Pattern.
2) Equipment composition : Follow Fig. 2.
3) Turn on the Jig for adjustment.
4) Select the RGB_PC by pressing the input select button on
Remote Control.
5) Output the 16 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray.
If it's not, press the IN-START button on Remote Control
and then adjust the level data of each step manually in
sub menu of 5. Gamma adjust.
6) Output the 64 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray or whether there is Gamma
noise.
If there's any problem, adjust in 5).
7) After finishing adjustment, exit adjustment mode by using
IN-START button on Remote Control.
5-5. White Uniformity Adjustment
(1) Required Test Equipments
1) Uniformity measurement equipment : Equipment which can
measure chromaticity in the whole screen
2) Set Stand 1EA
3) Remote Control for Adjustment
4) Circuit thing Jig for Adjustment(Except Driver Board Assy
of adjustment model)
--- Programmed Digital Board so that the VDP Test Pattern
can output white signal by 1 level form 0 to 255 level.
(2) A equipment composition
Compose the equipment follow Fig. 2 and place the set on
the fixation stand.
(3) Preparation for Adjustment
1) Composite the equipment as shown Fig 2, and place the
set on fixation stand.
2) After inputting company channel 13, adjust color uniformity
like Horizontal/Vertical position adjustment of input signal
part adjustment by using Remote Control for adjustment.
3) After pressing IN-START key on Remote Control for adjust-
ment, select the adjustment mode 6. Uniformity adj.
Refer to register value and correct register value if need.
<Resister Explanation about uniformity adjustment>
1. RamCtrl : s/w saving uniformity write order(Do not adjust)
2. CSHP : Horizontal start point designation ---adjustable
3. CSVP : Vertical start point designation ---adjustable
4. CEHP : Horizontal END point designation ---adjustable
5. CEVP : Vertical END point designation ---adjustable
6. Mode : uniformity mode select --- adjustable if need
*** 0 : 221point & 3level ---- defalut value
*** 1 : 221point & 4level
*** 2 : 825point & 3level
*** 3 : 825point & 4level
7. KHH : Upper 2byte of horizontal line correction coefficient -
- Change according to CSHP, CEHP value.
8. KHL : Upper 2byte of vertical line correction coefficient --
Change according to CSHP, CEHP value.
** How to calculate KHH, KHL value
LCD panel size = 1280 x 720
Correction Point = 221 point
--> 17 horizontal points x 13 vertical points
(16 horizontal segments x 12 vertical poins)
H Coefficient(KHH, KHL)
O
--> Calculation method (CEHP-CSHP=1280, Horizontal
segment value =16)
H coefficient = 1/(number of pixel intervals between setting in the horizontal
direction)
Hcoeff = 1/((1280/16)-1) = 0.012658227
hex(0.012658227 x 2
9. KVH : Upper 2byte of vertical line correction coefficient --
Change according to CSVP, CEVP value.
10. KVL : Upper 2byte of vertical line correction coefficient --
Change according to CSVP, CEVP value.
V Coefficient(KVH, KVL)
O
--> Calculation method (CEVP-CSVP=720, Vertical seg-
ment value =12)
V coefficient = 1/(number of pixel intervals between setting in the horizontal
direction)
Vcoeff = 1/((720/12)-1) = 0.016949152
hex(0.016949152 x 2
11. RL1H : Upper 9bit of MID2 brightness correction coeffi-
cient in R MIN.
--- Change according to RMIN and RMID2 value.
12. RL1L : Lower 9bit of MID2 brightness correction coeffi-
cient in R MIN.
--- Change according to RMIN and RMID2 value.
13. RL2H : Upper 9bit of MID1 brightness correction coeffi-
cient in R MID2.
--- Change according to RMID2 and RMID1 value.
14. RL2L : Lower 9bit of MID1 brightness correction coeffi-
cient in R MID2.
--- Change according to RMID2 and RMID1 value.
15. RL3H : Upper 9bit of MAX brightness correction coeffi-
cient in R MID1.
--- Change according to RMID1 and RMAX value.
(use it while adjusting 4 coefficient)
16. RL3L : Lower 9bit of MAX brightness correction coeffi-
cient in R MID1.
--- Change according to RMID1 and RMAX value.
(use it while adjusting 4 coefficient)
- 16 -
16
) = 0 x 033D, Hcoeff(hex) = 0 x 033D + 1 = 0 X 33E
16
) = 0 x 0456, Vcoeff(hex) = 0 x 0456 + 1 = 0 X 0457
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