Datasheet

CHAPTER 15 LCD CONTROLLER/DRIVER
User’s Manual U18698EJ1V0UD 389
Figure 15-8 shows the common signal waveforms, and Figure 15-9 shows the voltages and phases of the common
and segment signals.
Figure 15-8. Common Signal Waveforms
(a) Static display mode
COMn
(Static display)
T
F = T
V
LC0
LV SS
V LCD
T: One LCD clock period T
F: Frame frequency
(b) 1/2 bias method
COMn
(Two-time slot mode)
T
F = 2 × T
V
LC0
LVSS
VLCDVLC2
COMn
(Three-time slot mode)
T
F = 3 × T
V
LC0
LVSS
VLCDVLC2
T: One LCD clock period T
F: Frame frequency
(c) 1/3 bias method
COMn
(Three-time slot mode)
T
F = 3 × T
V
LC0
LV SS
V LCD
V LC1
V LC2
T F = 4 × T
COMn
(Four-time slot mode)
V
LC0
V LCD
V LC1
V LC2
LV SS
T: One LCD clock period T
F: Frame frequency