NXP Semiconductors
PCA85132
LCD driver for low multiplex rates
7.3.4 LCD drive mode waveforms
7.3.4.1 Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD.
Backplane and segment drive waveforms for this mode are shown in Figure 7.
Tfr
VLCD
BP0
VSS
VLCD
Sn
LCD segments
state 1
(on)
state 2
(off)
VSS
VLCD
Sn+1
VSS
(a) Waveforms at driver.
VLCD
state 1 0 V
−VLCD
VLCD
state 2 0 V
−VLCD
(b) Resultant waveforms
at LCD segment.
Fig 7.
Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = VLCD.
Vstate2(t) = V(Sn+1)(t) VBP0(t).
Voff(RMS) = 0 V.
Static drive mode waveforms
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PCA85132
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 9 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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