9-5
LED Backlight Drive Block Diagram
PL10.10BLBD
MAIN CB
A
PR
O
TECT3
BA
CKLIGHT
-ADJ
BA
CKLIGHT
-SW
TO SYSTEM CONTROL
BLOCK DIAGRAM
IC1033
(LED BACKLIGHT DRIVER)
OV
P
Q1031
CN873
DRIVE1
VREF
Q1028
Q1029
Q1035
CONTR
OL
LOGIC
26
13
1
28
24
14
17
LCD MODULE
ASSEMBL
Y
19
23
+24V
DRIVE2
3
2
DRIVE3
5
4
DRIVE4
7
6
LED DRIVE
Q1032
LED DRIVE
Q1033
LED DRIVE
Q1034
LED DRIVE
COMP1
4
+66.2V
6
COMP2
3
COMP3
2
COMP4
1