PCF8566
NXP Semiconductors
Universal LCD driver for low multiplex rates
7.4 LCD drive mode waveforms
7.4.1 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 5.
T
fr
LCD segments
V
LCD
BP0
Sn
V
SS
state 1
(on)
state 2
(off)
V
LCD
V
SS
V
LCD
Sn+1
V
SS
(a) Waveforms at driver.
V
LCD
state 1
0 V
−V
LCD
V
LCD
state 2
0 V
−V
LCD
(b) Resultant waveforms
at LCD segment.
mgl745
Vstate1(t) = VSn(t) − VBP0(t).
Von(RMS) = VLCD
.
Vstate2(t) = VSn+1(t) − VBP0(t).
Voff(RMS) = 0 V.
Fig 5. Static drive mode waveforms
PCF8566_7
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 — 25 February 2009
10 of 48
NXP [ NXP ]
