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OM4085T Datasheet(PDF) 9 Page - NXP Semiconductors

Part # OM4085T
Description  Universal LCD driver for low multiplex rates
Download  36 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

OM4085T Datasheet(HTML) 9 Page - NXP Semiconductors

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1997 Feb 25
9
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
OM4085
Fig.6 Waveforms for 1 : 2 multiplex drive mode with 1
⁄3 bias: Vop =VDD − VLCD.
handbook, full pagewidth
MGG393
state 1
0
BP0
(a) waveforms at driver
(b) resultant waveforms
at LCD segment
LCD segments
state 2
BP1
state 1
state 2
0
VDD
VDD − Vop/3
VDD − 2Vop/3
VLCD
VDD
VDD − Vop/3
VDD − 2Vop/3
VLCD
VDD
VDD − Vop/3
VDD − 2Vop/3
VLCD
VDD
VDD − Vop/3
VDD − 2Vop/3
VLCD
Vop
−Vop
2Vop/3
−2Vop/3
Vop/3
−Vop/3
Vop
−Vop
2Vop/3
−2Vop/3
Vop/3
−Vop/3
Sn + 1
Sn
Tframe
At any instant (t):
Vstate 1(t) = VSn(t) − VBP0(t)
Von(rms) =
Vop√5 = 0.745V
op
3
Vstate 2(t) = VSn(t) − VBP1(t)
Voff(rms) =
Vop
= 0.333Vop
3


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