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OM4085 Datasheet(PDF) 11 Page - NXP Semiconductors |
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OM4085 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 36 page 1997 Feb 25 11 Philips Semiconductors Product specification Universal LCD driver for low multiplex rates OM4085 Fig.8 Waveforms for 1 : 4 multiplex drive mode: Vop =VDD − VLCD. handbook, full pagewidth MGG396 state 1 0 BP0 (b) resultant waveforms at LCD segment LCD segments state 2 BP1 state 1 state 2 0 BP2 (a) waveforms at driver BP3 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 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 Sn + 1 Sn + 2 Sn + 3 Tframe At any instant (t): Vstate 1(t) = VSn(t) − VBP0(t) Von(rms) = Vop√3 = 0.577V op 3 Vstate 2(t) = VSn(t) − VBP1(t) Voff(rms) = Vop = 0.333Vop 3 |
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