PCF85134HL-1 NXP [NXP Semiconductors], PCF85134HL-1 Datasheet - Page 10
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PCF85134HL-1
Manufacturer Part Number
PCF85134HL-1
Description
Universal LCD driver for low multiplex rates
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCF85134HL-1.pdf
(40 pages)
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NXP Semiconductors
PCF85134_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
PCF85134 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)
state 1
state 2
Sn+1
(t) = V
(t) = V
BP0
BP1
Sn
= 0.791V
= 0.354V
Sn
Sn
Rev. 01 — 17 December 2009
(t)
(t)
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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
BP0
BP1
/2
/2
/2
/2
.
.
/2
/2
(t).
(t).
1
2
bias or
1
3
(a) Waveforms at driver.
(b) Resultant waveforms
bias in this mode as shown in
Universal LCD driver for low multiplex rates
at LCD segment.
T
fr
1
2
bias
013aaa208
state 1
state 2
LCD segments
PCF85134
© NXP B.V. 2009. All rights reserved.
Figure 5
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