CHAPTER 3 LCD CONTROLLER/DRIVER
User’s Manual U18438EJ2V0UD
31
Figure 3-10 shows the common signal waveforms, and Figure 3-11 shows the voltages and phases of the common
and segment signals.
Figure 3-10. 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
LV
SS
V
LCD
V
LC2
COMn
(Three-time slot mode)
T
F
= 3
×
T
V
LC0
LV
SS
V
LCD
V
LC2
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