BU97931FV-LB Datasheet, PDF (19/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97931FV-LB MAX 112 segments (SEG28×COM4)
LCD driving waveform
1/4Duty
Line inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
COM0
Vreg
COM1
VSS
Vreg
COM2
VSS
Vreg
COM3
VSS
Vreg
SEGn
VSS
Vreg
SEGn+1
VSS
Vreg
SEGn+2
VSS
Vreg
SEGn+3
VSS
Vreg
VSS
Vreg
1frame
stateA
(COM0-SEGn)
Frame inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
COM0
COM1
COM2
COM3
SEGn
SEGn+1
SEGn+2
SEGn+3
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
VSS
Vreg
1frame
stateA
(COM0-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
-Vreg
Datasheet
Figure 11. Waveform of Line Inversion
Figure 12. Waveform of Frame Inversion
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TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002