Purdy AND1781MST-BST User Manual

AND1781MST/BST

240 x 64 Dots
Intelligent Graphics Display

The AND1781MST/BST devices are compact, full dot matrix,
with “white page” appearance, LCD modules that have an on­board LCD controller (T6963C) and display memory (RAM).

Features

• RoHS Compliant

• Black and white ST (MST) transmissive mode

• Blue and white (BST) transmissive mode

• Built-in CCFL backlight

• 40 characters x 8 line capability

• 240 x 64 dot graphic display

• Excellent readability and high-contrast ratio

• Built-in LCD controller (T6963C)

• Wide operating temperature range (0° to 50°C)

• User-selectable fonts: 6 x 8 or 8 x 8

Dot Matrix Dimensions

127.17

0.53

0.50

33.89

0.59

0.50

240 x 64 pixels

Mechanical Characteristics

Item Specification Unit

Outline
Dimensions

180.0 (W) x 70.0 (H) x 14.0 Max (D) mm

Number of Dots 240 x 64 Dots

# of Characters 40 x 8 (480), 6 x 8 font

Viewing Area 127.17 (W) x 33.89 (H) mm

Bezel Opening 137.0 (W) 44.0 (H) mm

Dot Size 0.50 (W) 0.50 (H) mm

Dot Pitch 0.53 (W) 0.53 (H) mm

Weight (approx.) 170 gram

Product specifications contained herein may be changed

without prior notice. It is therefore advisable to contact
Purdy Electronics before proceeding with the design of

equipment incorporating this product.

The AND1781 can display TEXT information, numerals,
letters and symbols, as well as GRAPHIC patterns. These
devices are suitable for medical and measurement
equipment, point-of-sale terminals, portable equipment, and
marine instrumentation.

Absolute Maximum Ratings

Absolute Maximum

Item Symbol Min Max Unit

V

Supply Voltage

CCFL Input Current

CCFL Driving Voltage

(1)

CCFL Drive Frequency

Input Voltage

Storage Temperature

Operating Temperature

(2)

Humidity

1. 1 minute maximum.

2. Wet bulb temperature ≤ 29° C, no condensation of water.

DD

V

- V

DD

I

FL

V

FL

f

FL

V

IN

T

stg

T

OP

– 10 90 °/° RH

0 7.0 V

0 28.0 V

EE

–10

– 1500

– 35 kHz

-0.03 0.3 V

-20 60 °C

050 °C

mA

rms

V

rms

Electrical Characteristics (TA = 25°C)

Specifications

Item Symbol Cond.

V

Supply
Voltage

High Level In
V

Low Level
In V

FL Driving V

FL Input

(1)

Current

DD

V

-

DD

V

EE

V

IN

V

IH

V

IN

I

FL

V

DD

5.0V

V

FL

Min.

(BST/

MST)

4.75 5.0 5.25

11.2/

12.0

2.8 —

=

4.0 5.0 7.0

Typ.
(BST/
MST)

12.2/

13.0

Max.
(BST/
MST)

13.2/

14.0

V

DD

0 — 0.8

— 300 350

Unit

V

V

V

rms

mA

rms

7/20/07

Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

1

E1241/42

CCF

Tube

1

2

3

4

V

out

+

-

Input bypass capacitor may be required (10µf –47µf)

AND1781MST/BST

Intelligent Graphics Display

Electrical Characteristics (TA = 25°C) (Continued)

Item Symbol Cond.

FL Starting V

FL Driving Fre-

V

Ta = 0°C 1300 — —

FLS

IFL(2)

quency

I

DD

Typical

Pattern

I

I

I

EE

DD

EE

Max.

Pattern

Current
Consumption

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.

Optical Characteristics (TA = 25˚C, φ = 0°, θ = 0)

Item Symbol

Viewing Angle

Right to Left – 80

Up & Down – 55

Contrast Ratio K 2.5/8 3.5/20 — —

T

Response Time

Luminance
I

= 5.0 mA rms

FL

ON

T

OFF

L5080—

Note: Refer to Applications Section for definitions of viewing

angle, contrast ratio, response time (“on” and “off”)
and luminance.

Connector Pin Assignment

Pin No. Signal Function

1 FGND Frame Ground

2 GND Ground

3

4

V

V

5WR

6RD

7CE

Power Supply (5V)

DD

Power Supply for LCD Drive

EE

Data Write

Data Read

Chip Enable

WR = “L”, C/D = “H”: Command Write
WR

8 C/D

2

9 NC No connection

Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com

= “L”, C/D = “L”: Data Write

RD

= “L”, C/D = “H”: Status Read

RD

= “L”, C/D = “L”: Data Read

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

Specifications

Min.
(BST/
MST)

Typ.
(BST/
MST)

25 30 35 kHz

— 7.0 14.0

(3)

— 1.0 2.0

— 8.0 16.0

(3)

— 1.5 3.0

Specifications

Min.
(BST/
MST)

Typ.

(BST/

MST)

Max.
(BST/
MST)

— 200 350

— 200 350

Max.
(BST/
MST)

Unit

V

O-P

mA

Unit

degree

ms

cd/m

Connector Pin Assignment (Continued)

Pin No. Signal Function

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

20 RV

Connect to V
Connect to GND: 8 x 8 font

V

: Positive image

DD

GND: Negative image

: 6 x 8 font

DD

FL Connector

Pin No, Signal Function

1

5

V

Power supply for FL backlight

FL

V

Power supply for FL backlight

FL

Note: Connector: IL-G-55-53C2, Japan Aviation Electronics

Industry. Mating Housing: IL-M-5P-S3C2-PM.
Contact: IL-M-C2.

Recommended FL Inverter

2

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
V

is required for contrast control and temperature

EE

compensation.

Temperature Variations

V

Temperature

DD

–V

EE

0°C 13.5 14.3

+25°C 12.2 13.0

+50°C 11.0 11.8

–V

DD

(MST) V

, so adjustable

EE

–V

(BST)

DD

EE

7/20/07