4.2.Example of Power Supply
It is recommended to apply a potentiometer for the contrast adjust due to the tolerance
of the driving voltage and its temperature dependence.
V D D
V D D (+ V oltag e)
R 1
T r
V E E
V R
M O D U LE
R 2
V E E (-V o ltag e)
G N D (0V )
G N D
R 1+ R 2 + V R = 10～ 20 KΩ
T r= 2S A 1 20 2 o r eq uivale nt
4.3.Block Diagram
8
Row Driver
128
D0～D7
WR
L C D P
T6A40 × 2
or equivalent
240 × 128 dots
RD
3
240
Control LSI
5
CE
T6963C-0101
4
Column Driver
C/D
T6A39 × 3
or equivalent
RESET
FS
X-tal
12
8
X-OR
64K S-RAM
RV
VDD
GND
Bias Circuit
To LSI
J
FGND
VEE
VFL
VFL
CFL Backlight
DMF-50773NB-FW (AG) No.99-0083
OPTREX CORPORATION
Page 10/17
OPTREX
OPTREX [ OPTREX CORPORATION ]
