BU97981KV-E2 Datasheet, PDF (32/50 Pages) Rohm – Multi-function LCD Segment Drivers

BU97981xxx Series MAX 196 segments (SEG49xCOM4)
LCD Driving Waveform
1/4Duty
Line inversion
SEGn SEGn+1SEGn+2SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
Vreg
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
1frame
stateA
(COM0-SEGn)
Frame inversion
SEGn SEGn+1SEGn+2SEGn+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 19. Waveform of Line Inversion
Figure 20. Waveform of Frame Inversion
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10.Apr.2015 Rev.006