PCF85134HL-1 NXP [NXP Semiconductors], PCF85134HL-1 Datasheet - Page 12
PCF85134HL-1
Manufacturer Part Number
PCF85134HL-1
Description
Universal LCD driver for low multiplex rates
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCF85134HL-1.pdf
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PCF85134_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 V
0 V
= 0.638V
= 0.333V
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
Rev. 01 — 17 December 2009
(t)
(t)
/3
/3
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
PCF85134
© NXP B.V. 2009. All rights reserved.
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