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PCA9620 Arkusz danych(PDF) 23 Page - NXP Semiconductors

Numer części PCA9620
Szczegółowy opis  Universal LCD driver for low multiplex rates
PDF  71 Pages
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Producent  NXP [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
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PCA9620 Arkusz danych(HTML) 23 Page - NXP Semiconductors

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PCA9620
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 1 — 9 December 2010
23 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
7.4.2 LCD drive mode waveforms
7.4.2.1
Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD.
Vstate1(t) = VSn(t) − VBP0(t).
Vstate2(t) = V(Sn + 1)(t) − VBP0(t).
Von(RMS)(t) = VLCD. Voff(RMS)(t) = 0 V.
Fig 15. Static drive mode waveforms (line inversion mode)
013aaa207
VSS
VLCD
VSS
VLCD
VSS
VLCD
VLCD
−VLCD
−VLCD
VLCD
state 1
0 V
BP0
Sn
Sn+1
state 2
0 V
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 1
(on)
state 2
(off)
Tfr



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