PCA85133 NXP [NXP Semiconductors], PCA85133 Datasheet - Page 11

• Manufacturer Part Number: PCA85133
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA85133_1
Product data sheet
7.4.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies, as
shown in
Fig 7.
state 1
state 2
Sn+1
Sn+2
Figure
V
V
V
V
Waveforms for the 1:3 multiplex drive mode with
BP2
BP0
BP1
state1
on(RMS)
state2
off(RMS)
Sn
(t) = V
(t) = V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
2V
V
7.
= 0.638V
= 0.333V
0 V
0 V
V
2V
V
V
2V
V
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Sn
Sn
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
(t)
(t)
/3
/3
Rev. 1 — 23 October 2009
LCD
LCD
V
V
BP0
BP1
.
.
(t).
(t).
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
Universal LCD driver for low multiplex rates
T
fr
1
3
bias
state 1
state 2
013aaa210
LCD segments
PCA85133
© NXP B.V. 2009. All rights reserved.
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