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參數(shù)資料
| 型號(hào)： | OM4085T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | Universal LCD driver for low multiplex rates |
| 中文描述： | LIQUID CRYSTAL DISPLAY DRIVER, PDSO40 |
| 文件頁(yè)數(shù)： | 7/36頁(yè) |
| 文件大?。?/td> | 225K |
| 代理商： | OM4085T |
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1997 Feb 25
7
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
OM4085
LCD drive mode waveforms
The static LCD drive mode is used when a single backplane is provided in the LCD. Backplane and segment drive
waveforms for this mode are shown in Fig.4.
When two backplanes are provided in the LCD the 1 : 2 multiplex drive mode applies. The OM4085 allows use of
1
2
or
1
3
bias in this mode as shown in Figs 5 and 6.
The backplane and segment drive waveforms for the 1 : 3 multiplex drive mode (three LCD backplanes) and for the 1 : 4
multiplex drive mode (four LCD backplanes) are shown in Figs 7 and 8 respectively.
Fig.4 Static drive mode waveforms: V
op
= V
DD
V
LCD
.
handbook, full pagewidth
MGG392
state 1
At any instant (t):
Vstate 1(t) = VSn(t)
VBP0(t)
Von(rms) = Vop
Vstate 2(t) = VSn
+
1(t)
VBP0(t)
Voff(rms) = 0 V
0
BP0
state 2
0
(a) waveforms at driver
(b) resultant waveforms
at LCD segment
LCD segments
state 1
(on)
state 2
(off)
VDD
VLCD
VDD
VLCD
VDD
VLCD
Vop
Vop
Vop
Vop
Tframe
Sn
Sn
+
1
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