BU9796AFS-E2 Datasheet, PDF (16/32 Pages) Rohm – Standard LCD Segment Driver

BU9796Axxx Series MAX 80 segments (SEG20×COM4)
●LCD driving waveform
(1/3bias)
Line inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
Frame inversion
SEGn SEGn+1 SEGn+2 SEGn+3
COM0 stateA
COM1 stateB
COM2
COM3
Datasheet
VDD
COM0
VLCD
VDD
COM1
VLCD
VDD
COM2
VLCD
VDD
COM3
SEGn
VLCD
VDD
VLCD
VDD
SEGn+1
VLCD
VDD
SEGn+2
VLCD
VDD
SEGn+3
VLCD
stateA
(C O M 0-SE Gn)
(VDD-VLCD)
2/3 (VDD-VLCD)
1/3 (VDD-VLCD)
0
-1/3 (VDD-VLCD)
-2/3 (VDD-VLCD)
- (VDD-VLCD)
stateB
(C O M 1-SE Gn)
(VDD-VLCD)
2/3 (VDD-VLCD)
1/3 (VDD-VLCD)
0
-1/3 (VDD-VLCD)
-2/3 (VDD-VLCD)
- (VDD-VLCD)
1frame
Figure 16. LCD waveform at line inversion (1/3bias)
VDD
COM0
VLCD
VDD
COM1
VLCD
VDD
COM2
VLCD
VDD
COM3
SEGn
VLCD
VDD
VLCD
VDD
SEGn+1
VLCD
VDD
SEGn+2
VLCD
VDD
SEGn+3
VLCD
stateA
(COM0-SEGn)
(VDD-VLCD)
2/3 (VDD-VLCD)
1/3 (VDD-VLCD)
0
-1/3 (VDD-VLCD)
-2/3 (VDD-VLCD)
- (VDD-VLCD)
stateB
(COM1-SEGn)
(VDD-VLCD)
2/3 (VDD-VLCD)
1/3 (VDD-VLCD)
0
-1/3 (VDD-VLCD)
-2/3 (VDD-VLCD)
-(VDD-VLCD)
1frame
Figure 17. LCD waveform at frame inversion (1/3bias)
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TSZ02201-0A2A0D300100-1-2
13.Jun.2014 Rev.003