参数资料
型号: PCF8579U7
厂商: NXP SEMICONDUCTORS
元件分类: 显示驱动器
英文描述: LCD column driver for dot matrix graphic displays
中文描述: LIQUID CRYSTAL DISPLAY DRIVER, UUC55
封装: DIE-56
文件页数: 11/40页
文件大小: 287K
代理商: PCF8579U7
1997 Apr 01
11
Philips Semiconductors
Product specification
LCD column driver for dot matrix graphic
displays
PCF8579
Fig.7 LCD drive mode waveforms for 1 : 16 multiplex rate.sa.
MSA836
VDD
V2
V
V
V
V
LCD
3
4
5
Tframe
ROW 1
R1 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
ROW 2
R2 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
COL 1
C1 (t)
VDD
V2
V
V
V
V
LCD
3
4
5
COL 2
C2 (t)
dot matrix
1:16 multiplex rate
state 1 (OFF)
state 2 (ON)
0.2 Vop
0 V
0.2 Vop
Vop
Vop
Vstate 1(t)
0.2 Vop
0 V
0.2 Vop
0.6 Vop
Vop
Vop
Vstate 2(t)
0.6 Vop
V
state 1
(t) =C1(t)
R1(t):
V
on(rms)
V
op
=
1
16
16
(
1
16 1
)
16
= 0.316
V
state 2
(t) = C2(t)
R2(t):
V
off(rms)
V
op
=
16
1
16 1
(
)
16
= 0.254
2
2(
)
general relationship (n = multiplex rate)
V
on(rms)
V
op
=
1
n
n
1
n
1
(
)
n
V
off(rms)
V
op
=
n 1
n 1
(
)
n
2
2(
)
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