參數資料
型號: PCF8562
廠商: NXP Semiconductors N.V.
英文描述: Universal LCD driver for low multiplex rates
中文描述: 通用LCD驅動器的低復用率
文件頁數: 11/36頁
文件大?。?/td> 928K
代理商: PCF8562
November 22, 2004
11
Philips Semiconductors
Preliminary specification
Universal LCD driver
for low multiplex rates
PCF8562
handbook, full pagewidth
MGL746
state 1
BP0
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 2
state 1
VSS
VLCD
VLCD/2
VSS
VSS
VLCD
VLCD
VSS
VLCD
VLCD
VLCD/2
VLCD
VLCD/2
0 V
0 V
VLCD/2
VLCD
VLCD
VLCD/2
VLCD/2
Sn
Sn
+
1
Tframe
6.4.2
1 : 2
MULTIPLEX
DRIVE
MODE
The 1 : 2 multiplex drive mode is used when two backplanes are provided in the LCD. This mode allows fractional LCD
bias voltages of
1
2
bias or
1
3
bias as shown in Figs 6 and 7.
Fig.6 Waveforms for the 1 : 2 multiplex drive mode with
1
2
bias.
V
state1
t)
V
S
n
t)
V
BP0
t)
=
V
on(rms)
0.791V
LCD
=
V
state2
t)
V
S
n
t)
V
BP1
t)
=
V
off(rms)
0.354V
LCD
=
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