pcf85133 NXP Semiconductors, pcf85133 Datasheet - Page 8
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pcf85133
Manufacturer Part Number
pcf85133
Description
Universal Lcd Driver For Low Multiplex Rates
Manufacturer
NXP Semiconductors
Datasheet
1.PCF85133.pdf
(41 pages)
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NXP Semiconductors
PCF85133_1
Product data sheet
7.4.2 1:2 multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCF85133 allows the use of
Figure
Fig 5.
6.
V
V
V
V
Waveforms for the 1:2 multiplex drive mode with
state1
on(RMS)
state2
off(RMS)
Sn+1
state 1
state 2
(t) = V
(t) = V
BP0
BP1
S n
= 0.791V
= 0.354V
Sn
Sn
(t)
(t)
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Rev. 1 — 17 February 2009
0 V
0 V
V
V
V
V
LCD
LCD
SS
LCD
LCD
SS
LCD
SS
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
V
V
/ 2
/ 2
/ 2
/ 2
BP0
BP1
.
.
/ 2
/ 2
(t).
(t).
1
2
bias or
1
(a) Waveforms at driver.
(b) Resultant waveforms
3
bias in this mode as shown in
Universal LCD driver for low multiplex rates
at LCD segment.
T
fr
1
2
bias
state 1
state 2
mgl746
LCD segments
PCF85133
© NXP B.V. 2009. All rights reserved.
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