BU97981KV-E2 Datasheet, PDF (33/50 Pages) Rohm – Multi-function LCD Segment Drivers

BU97981xxx Series MAX 196 segments (SEG49xCOM4)
Datasheet
1/3Duty
Line inversion
SEGn SEGn+1SEGn+2SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
Vreg
When 1/3duty
COM3 and COM1 is same
1frame
COM0
VSS
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
Frame inversion
SEGn SEGn+1SEGn+2SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
Vreg
When 1/3duty
COM3 and COM1 is same
1frame
COM0
VSS
Vreg
COM1
VSS
Vreg
COM2
VSS
Vreg
When 1/3duty
COM3 and COM1 ^COM3
is same
VSS
Vreg
SEGn
VSS
Vreg
SEGn+1
VSS
Vreg
SEGn+2
VSS
Vreg
SEGn+3
VSS
Vreg
stateA
(COM0-SEGn)
stateA
(COM0-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
Vreg
stateB
(COM1-SEGn)
-Vreg
-Vreg
Figure 21. Waveform of Line Inversion
Figure 22. Waveform of Frame Inversion
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TSZ02201-0A2A0D300110-1-2
10.Apr.2015 Rev.006