NEC mPD780344 Series User Manual page 373

(3) Common signal and segment signal output waveforms
The voltages shown in Figures 18-10 and 18-11 are output for the common signals and segment signals.
The ±V
ON voltage is only produced when the common signal and segment signal are both at the selection
LCD
voltage; other combinations produce the OFF voltage.
SCOM0
(Static)
T
COMn
(Divided by 3)
COMn
(Divided by 4)
T: One LCDCL cycle
T : Frame frequency
F
CHAPTER 18 LCD CONTROLLER/DRIVER
Figure 18-10. Common Signal Waveform
(a) Static display mode
= T
F
(b) Dynamic display mode (1/3 bias method)
= 3 × T
T
F
= 4 × T
T
F
User's Manual U15798EJ2V0UD
V
LCD0
V
LCD
V
SS
V
LCD0
V
LCD1
V
LCD
V
LCD2
V
SS
V
LCD0
V
LCD1
V
LCD
V
LCD2
V
SS
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