BU97941FV_15 Datasheet, PDF (15/27 Pages) Rohm – Multifunction LCD Segment Driver

BU97941FV MAX 104 segments (SEG26×COM4)
1/1Duty (Static)
Line inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA stateB
COM1
COM2
COM3
When 1/1duty (Static)
COM1 ： same waveform as COM0
COM2 ：same waveform as COM0
COM3 ：same waveform as COM0
Vreg
COM0
1frame
COM1
VSS
Vreg
COM2
VSS
Vreg
COM3
VSS
Vreg
SEGn
VSS
Vreg
VSS
Vreg
SEGn+1
SEGn+2
VSS
Vreg
VSS
Vreg
SEGn+3
VSS
Vreg
stateA
Frame inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA stateB
COM1
COM2
COM3
When 1/1duty (Static)
COM1 ：same waveform as COM0
COM2 ：same waveform as COM0
COM3 ：same waveform as COM0
Vreg
COM0
1frame
When 1/1duty
(Static)
COM1 / COM0 ^COM1
is same waveform
COM2 / COM0
is same waveform ^COM2
COM3 / COM0
is same waveform
COM3
VSS
Vreg
VSS
Vreg
VSS
Vreg
SEGn
VSS
Vreg
VSS
Vreg
SEGn+1
VSS
Vreg
SEGn+2
VSS
Vreg
SEGn+3
VSS
Vreg
stateA
-Vreg
Vreg
stateB
-Vreg
Vreg
stateB
-Vreg
Figure 13.LCD Drive Waveform during Line inversion
-Vreg
Figure 14. LCD Drive Waveform during Frame inversion
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10.Apr.2015 Rev.004