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OM4068H Datasheet(PDF) 11 Page - NXP Semiconductors

Part # OM4068H
Description  LCD driver for low multiplex rates
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

OM4068H Datasheet(HTML) 11 Page - NXP Semiconductors

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1998 Jun 18
11
Philips Semiconductors
Product specification
LCD driver for low multiplex rates
OM4068
1:2MULTIPLEX DRIVE MODE
When two backplanes are provided in the LCD, the 1 : 2 multiplex mode applies, as shown in Fig.6.
1:3MULTIPLEX DRIVE MODE
When three backplanes are provided in the LCD, the 1 : 3 multiplex mode applies, as shown in Fig.7.
MBK820
VLCD
1/2VLCD
BP1
BP2
VSS
Tframe
SEG - BP1
SEG - BP2
Tframe
Tframe
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
VLCD
1/2VLCD
VSS
SEG N
SEG N
+ 1
SEG N
+ 2
SEG N
+ 3
VLCD
1/2VLCD
VSS
VLCD
1/2VLCD
VSS
VLCD
1/2VLCD
VSS
VLCD
1/2VLCD
VSS
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
1/2VLCD
VLCD
0 V
−1/2VLCD
−VLCD
Fig.6 Waveforms for 1 : 2 multiplex drive mode (VOP =VLCD − VSS).
BACKPLANE
DRIVER OUTPUTS
SEGMENTS
SEG N
SEGN+1 SEG N+2 SEGN+3
BP1
off
on
off
on
BP2
off
off
on
on


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