pca85132 NXP Semiconductors, pca85132 Datasheet - Page 14

• Manufacturer Part Number: pca85132
• Description: Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA85132_1
Product data sheet
7.4.4 1:4 multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies as
shown in
Fig 9.
Sn+1
Sn+2
Sn+3
state 1
state 2
BP2
BP0
BP1
BP3
Sn
Figure
V
V
V
V
Waveforms for the 1:4 multiplex drive mode with
state1
on(RMS)
state2
off(RMS)
(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
V
2V
V
V
V
2V
V
−V
−2V
−V
V
2V
V
−V
−2V
−V
0 V
0 V
All information provided in this document is subject to legal disclaimers.
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
9.
= 0.577V
= 0.333V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
Sn
Sn
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
/3
(t) − V
(t) − V
LCD
LCD
Rev. 01 — 6 May 2010
BP0
BP1
.
.
(t).
(t).
(b) Resultant waveforms
(a) Waveforms at driver.
at LCD segment.
T
fr
LCD driver for low multiplex rates
1
⁄
3
bias
state 1
state 2
PCA85132
013aaa211
© NXP B.V. 2010. All rights reserved.
LCD segments
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