BU97941FV-LB Datasheet, PDF (14/26 Pages) Rohm – Multifunction LCD Segment Driver

BU97941FV-LB MAX 104 segments (SEG26×COM4)
Datasheet
1/3Duty
Line inversion
SEGn SEGn+1 SEGn+2 SEGn+3
Frame inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0
COM0 stateA
COM1 stateB
COM2
COM3
Vreg
When 1/3duty
COM3 waveform output is same as COM1
1frame
COM0
COM0 stateA
COM1 stateB
COM2
COM3
Vreg
When 1/3duty
COM3 waveform output is same as COM1
1frame
COM1
VSS
Vreg
VSS
Vreg
COM1
COM2
VSS
Vreg
COM2
VSS
Vreg
COM3
VSS
Vreg
SEGn
VSS
Vreg
When 1/3duty ^COM3
COM3 waveform output
is same as COM1
SEGn
VSS
Vreg
VSS
Vreg
VSS
Vreg
SEGn+1
VSS
Vreg
SEGn+1
VSS
Vreg
SEGn+2
VSS
Vreg
SEGn+2
SEGn+3
VSS
Vreg
VSS
Vreg
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 11. LCD Drive Waveform during Line inversion Figure 12. LCD Drive Waveform during Frame inversion
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26.Feb.2014 Rev.002