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AMPIRE CO., LTD.
9
7
POWER SUPPLY
LCD Module
VO
VDD(+5V)
R1
R2
VR
VSS
5V Power Input
LCD Module
VO
VDD(+3.3V)
VR
VSS
DC/DC
Converter
R8
-3.3V
3.3V Power Input
LCD Bias
Circuit
LCD Bias
Circuit
R9
R10
A
1
K
2
LED_BACKLIGHT
LED_A (Pin 15)
LED_K (Pin 16)
JP2
JP1
JP3
1
2
3
JP4
1
2
3
JP5
VDD
There are four methods to light up the LED back-light : (Please indicate while ordering.)
(1) Built-in current-limit resistor(R9/R10). Add +5V between Pin15&16. (Default)
(2) Add +4.05V between LED A & K directly.
(3) Short JP2 and add +4.05V between Pin15&16.
(4) Built-in current-limit resistor(R9/R10) and short JP1&JP3. Use the same power (+5V) with
the logic circuit.
EL Back-light
EL1
EL2
AC110V(400Hz)
LCM
Using EL Back-light