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CHAPTER 12 LCD CONTROLLER/DRIVER
Figure 12.4-6 Output waveforms, 1/3 bias and 1/4 duty ratio example
V
3
V
2
V
1
V
0
=V
SS
V
3
V
2
V
1
V
0
=V
SS
V
3
V
2
V
1
V
0
=V
SS
V
3
V
3
V
3
V
0
=V
SS
V
3
V
2
V
1
V
0
=V
SS
V
3
V
2
V
1
V
0
=V
SS
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
COM0
COM1
COM2
COM3
SEG
n
SEG
n+1
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
V
3
(ON)
V
2
V
1
V
SS
-V
1
-V
2
-V
3
(ON)
Difference in
potential between
COM0 and SEG
n
Difference in
potential between
COM1 and SEG
n
Difference in
potential between
COM2 and SEG
n
Difference in
potential between
COM3 and SEG
n
Difference in
potential between
COM0 and SEG
n+1
Difference in
potential between
COM1 and SEG
n+1
Difference in
potential between
COM2 and SEG
n+1
Difference in
potential between
COM3 and SEG
n+1
1 frame
1 cycle
V1 to V3: V1 to V3 pin voltages