BU97931FV Datasheet, PDF (20/32 Pages) Rohm – Multifunction LCD Segment Driver

BU97931FV MAX 112 segments (SEG28×COM4)
1/3Duty
Line inversion
SEGn SEGn+1 SEGn+2 SEGn+3
Frame inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA
COM0 stateA
COM1 stateB
COM1 stateB
COM2
COM2
COM3
Vreg
When 1/3duty
COM3 and COM1 is same
1frame
COM3
Vreg
When 1/3duty
COM3 and COM1 is same
1frame
COM0
COM0
VSS
Vreg
VSS
Vreg
COM1
COM1
VSS
Vreg
VSS
Vreg
COM2
COM2
COM3
VSS
Vreg
VSS
Vreg
VSS
Vreg
When 1/3duty
COM3 and COM1 ^COM3
is same
VSS
Vreg
SEGn
SEGn
VSS
Vreg
VSS
Vreg
SEGn+1
SEGn+1
VSS
Vreg
VSS
Vreg
SEGn+2
SEGn+2
VSS
Vreg
VSS
Vreg
SEGn+3
SEGn+3
VSS
Vreg
VSS
Vreg
stateA
(COM0-SEGn)
stateA
(COM0-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
-Vreg
Figure 13. Waveform of Line Inversion
Figure 14. Waveform of Frame Inversion
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10.Apr.2015 Rev.004