HD66137 Datasheet, PDF (9/19 Pages) Hitachi Semiconductor – High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD

HD66137T
Application Example (2)
Figure 2 shows an application example 320 × 3 (collar) × 240 dot Quarter VGA Size STN color panel.
This panel configured HD66137 × 1 piece and HD66130 × 3 pieces.
HD66137 generates M signal and DOC signal. M signal pin is connected M signal pin of HD66130 and
DOC signal pin is connected DISP signal pin of HD66136.
HD66137 is able to generates - voltage by external capacitor.
VEO pin is connected VEE pin and VL pin.
CA
CL
CCL
RESET
DISPOFF
AMP
M/S
DOC
M
NWS0~4
VHL, R
VML, R
C0+
VLL, R
C1
–
C2
VLCD
V0
VCC
VM
V1
GND
com1
com2
com3
com238
com239
com240
LCD panel
320 × 3 (collar) × 240
1/240duty
Y320~Y1
SHL
EIO2
MODE
GND
HD66130
(No.1)
VCC
EIO1
Y320~Y1
SHL
EIO2
MODE
GND
HD66130
(No.2)
VCC
EIO1
Y320~Y1
SHL
EIO2
MODE
GND
HD66130
(No.3)
EIO1
VCC
Controller
Notes :
1. When designing the board, connect a capacitor near the IC to stabilize power supply. Use two capacitors of about 0.1µF
for each IC (between Vcc and GND, V0 and GND, VLCD and GND, and VEE and GND).
2. In addition, for the power supply circuit, connect a capacitor of several µF or several tens of µF between the liquid-crystal
power supply and GND. For set evaluation, confirm that there is no inversion of liquid-crystal drive power supply and
level power supply in the period between when the liquid-crystal drive power supply is turned on and when it is turned off.
3. When useing external capacitor to generate VEE, you must connect a capacitor of several µF or several tens of µF
between the VEE and GND.
Figure 2 Application Example (2)
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