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| PCF8533 Datasheet, PDF (8/36 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates | |||
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Philips Semiconductors
Universal LCD driver for low multiplex rates
Product speciï¬cation
PCF8533
6.4 LCD drive mode waveforms
6.4.1 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 Fig.3.
handbook, full pagewidth
Tframe
VLCD
LCD segments
BP0
VSS
VLCD
Sn
VSS
state 1
(on)
state 2
(off)
Sn + 1
VLCD
VSS
(a) Waveforms at driver.
VLCD
state 1 0 V
âVLCD
VLCD
state 2 0 V
âVLCD
(b) Resultant waveforms
at LCD segment.
MGL745
Vstate1(t) = Vsn(t) â VBP0(t).
Von(rms) = VLCD.
Vstate2(t) = Vsn + 1(t) â VBP0(t).
Voff(rms) = 0 V.
1999 Jul 30
Fig.3 Static drive mode waveforms.
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