Intelligent Graphics Display
AND1781MST/BST
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
2
Tel: 408.523.8200 • Fax: 408.733.1287 • email@purdyelectronics.com • www.purdyelectronics.com
7/20/07
1. Life time of backlight will change according to the FL input
current.
2. Choose a driving frequency that is not in sync with the frame
frequency otherwise, you may experience flickering.
3. Typical pattern is all “on”, maximum pattern is checkered.
Note: Refer to Applications Section for definitions of viewing
angle, contrast ratio, response time (“on” and “off”)
and luminance.
Note: Connector: IL-G-55-53C2, Japan Aviation Electronics
Industry. Mating Housing: IL-M-5P-S3C2-PM.
Contact: IL-M-C2.
Recommended FL Inverter
Part number E1241/42 (part number E1241 is +5v, number
E1242 is +12V). This part is manufactured by Endicott
Research Group, Inc.. Method of connecting is illustrated.
Power Supply
LCD panel is driven by the voltage V
DD
–V
EE
, so adjustable
V
EE
is required for contrast control and temperature
compensation.
FL Starting V
V
FLS
Ta = 0°C 1300 — —
V
O-P
FL Driving Fre-
quency
I
FL
(2)
25 30 35 kHz
Current
Consumption
I
DD
Typical
Pattern
(3)
— 7.0 14.0
mA
I
EE
— 1.0 2.0
I
DD
Max.
Pattern
(3)
— 8.0 16.0
I
EE
— 1.5 3.0
Optical Characteristics (TA = 25˚C,
φ
= 0°,
θ
= 0)
Specifications
Item Symbol
Min.
(BST/
MST)
Typ.
(BST/
MST)
Max.
(BST/
MST)
Unit
Viewing Angle
Right to Left – 80
degree
Up & Down – 55
Contrast Ratio K 2.5/8 3.5/20 — —
Response Time
T
ON
— 200 350
ms
T
OFF
— 200 350
Luminance
I
FL
= 5.0 mA rms
L5080—
cd/m
2
Connector Pin Assignment
Pin No. Signal Function
1 FGND Frame Ground
2 GND Ground
3
V
DD
Power Supply (5V)
4
V
EE
Power Supply for LCD Drive
5WR
Data Write
6RD
Data Read
7CE
Chip Enable
8 C/D
WR = “L”, C/D = “H”: Command Write
WR
= “L”, C/D = “L”: Data Write
RD
= “L”, C/D = “H”: Status Read
RD
= “L”, C/D = “L”: Data Read
9 NC No connection
Electrical Characteristics (TA = 25°C) (Continued)
Specifications
Item Symbol Cond.
Min.
(BST/
MST)
Typ.
(BST/
MST)
Max.
(BST/
MST)
Unit
10 RESET
Controller Reset
11 D0 Data Input/Output (LSB)
12 D1 Data Input/Output
13 D2 Data Input/Output
14 D3 Data Input/Output
15 D4 Data Input/Output
16 D5 Data Input/Output
17 D6 Data Input/Output
18 D7 Data Input/Output (MSB)
19 FS
Connect to V
DD
: 6 x 8 font
Connect to GND: 8 x 8 font
20 RV
V
DD
: Positive image
GND: Negative image
FL Connector
Pin No, Signal Function
1
V
FL
Power supply for FL backlight
5
V
FL
Power supply for FL backlight
Temperature Variations
Temperature
V
DD
–V
EE
(MST) V
DD
–V
EE
(BST)
0°C 13.5 14.3
+25°C 12.2 13.0
+50°C 11.0 11.8
Connector Pin Assignment (Continued)
Pin No. Signal Function
E1241/42
CCF
Tube
1
2
3
4
V
out
+
-
Input bypass capacitor may be required (10µf –47µf)
(5 pages)
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