SED1751
MLS Driver Chip Set
EPSON
5–5
Technical Manual
Explanation of Each Block
Shift Register
This is a bi-directional shift register used for transmitting common data. The display data shifts on the
falling edge of LP.
Level Shifter
The level shifter is a voltage level converter circuit which converts the signal voltage level from a logic
system level to the LC driver system voltage level.
LCD Driver
The LCD driver outputs the LC drive voltage.
The relationship between the display blanking signal
DOFF
, the field recognition signals F1 & F2, the AC
signal FR, and the common output voltage is as follows:
DOFF
H
L
FR
L
H
—
F1,F2
1,1
0,1
1,0
0,0
1,1
0,1
1,0
0,0
—
Line 1
+V
1
+V
1
–V
1
+V
1
–V
1
–V
1
+V
1
–V
1
V
C
Line 2
–V
1
+V
1
+V
1
+V
1
+V
1
–V
1
–V
1
–V
1
V
C
Line 3
+V
1
–V
1
+V
1
+V
1
–V
1
+V
1
–V
1
–V
1
V
C
Line 4
+V
1
+V
1
+V
1
–V
1
–V
1
–V
1
–V
1
+V
1
V
C
Voltage level relationships: + V
1
> V
C
> –V
1
(V
C
is the center voltage level)
Summary of Contents for SED1751
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