CHAPTER 3 LCD CONTROLLER/DRIVER
User’s Manual U18438EJ2V0UD
30
(3) Output waveforms of common and segment signals
The voltages listed in Table 3-5 are output as common and segment signals.
When both common and segment signals are at the select voltage, a display on-voltage of
±
V
LCD
is obtained.
The other combinations of the signals correspond to the display off-voltage.
Table 3-5. LCD Drive Voltage
(a) Static display mode
Segment Signal
Select Signal Level
Deselect Signal Level
Common Signal
LV
SS
/V
LC0
V
LC0
/LV
SS
V
LC0
/LV
SS
–V
LCD
/+V
LCD
0 V/0 V
(b) 1/2 bias method
Segment Signal
Select Signal Level
Deselect Signal Level
Common Signal
LV
SS
/V
LC0
V
LC0
/LV
SS
Select signal level
V
LC0
/LV
SS
–V
LCD
/+V
LCD
0 V/0 V
Deselect signal level
V
LC1
= V
LC2
– V
LCD
/+ V
LCD
+ V
LCD
/– V
LCD
(c) 1/3 bias method
Segment Signal
Select Signal Level
Deselect Signal Level
Common Signal
LV
SS
/V
LC0
V
LC1
/V
LC2
Select signal level
V
LC0
/LV
SS
–V
LCD
/+V
LCD
– V
LCD
/+ V
LCD
Deselect signal level
V
LC2
/V
LC1
– V
LCD
/+ V
LCD
– V
LCD
/+ V
LCD
1
2
1
2
1
2
1
2
1
3
1
3
1
3
1
3
1
3
1
3