STN Yellow-green

STN Yellow-green

STN yellow-green LCD
STN yellow-green LCD ADM12232G
Model No. ADM12232G
►STN yellow-green LCD 122x32, Display LCD 122x32
►Monochrome Graphic LCD

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Product Details

STN yellow-green LCD

STN yellow-green LCD ADM12232G

Model No. ADM12232G

►STN yellow-green LCD 122x32, Display LCD 122x32

►Monochrome Graphic LCD

►Built-in controller (S1D15200 DOA or equivalent)

►+5V power supply

►1/32 duty cycle

►8 bits parallel data input

Description of STN yellow-green LCD ADM12232G

122x32 dots COB (Chip on Board) Graphic LCD Module in STN yellow-green LCD Mode with yellow-green LED Backlight. It has a six O'clock viewing direction and a transflective polarizer suitable for dark environment. This STN yellow-green LCD ADM12232G is assembled Chip On board with 1/32 Duty and a Controller IC SED15200 or equivalent.

Features

1.122 x 32 dots

2.BUILT-IN CONTROLLER (S1D15200DOA OR EQUIVALENT)

3.+5V POWER SUPPLY

4.8 bits parallel data input

5.1/32 duty cycle

6.With Backlight

1(001).jpg

Absolute Maximum Ratings

Item

Symbol

Min

Max

Unit

Power Voltage

VDD -VSS

0

7.0

 

V

Input Voltage

VO

VSS

VDD

Operating Temperature Range

TOP

0

50

Storage Temperature Range

TST

-10

60

*Wide temperature range is available

(operating/storage temperature as –20~+70/-30~+80℃)

Block diagram

2.jpg

Description Of Terminals

Pin 

No.

Pin Name

Inut/ Output

External Connection

Function

1

VSS


Power
Supply

Signal ground for LCM

2

VDD

VDD: +5V

3

VO

VLCD adjustment


4


A0


Input


MPU

Register select input
“0”:Instruction register (when writing)
Busy flag address counter (When reading)
“1”:Data register (when writing & reading)

5

CS1

Input

MPU

Chip select signal for IC1

6

CS2

Input

MPU

Chip select signal for IC2

7

CL



Clock input2KHz)

8

E



Enable ignal


9


R/W


Input


MPU

Read/write select signal
“0” for writing, “1” for reading

10~17

DB0-DB7

Input/output

MPU

Data bus [0~7] Bi-directional data bus

18

/RET



Reset signal

19

LED+

Input

LED BKL
power supply

Power supply for BKL

20

LED-


Power supply for BKL (GND)

Contrast adjust

3.jpg

VDD~V0: LCD Driving voltage

VR: 10K~20K

Optical Characteristics

For STN Type Display Module (Ta=25℃, VDD=5.0V±0.25V)

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Viewing angle

θ

C ≥2

-60

35


Φ

-40

40

deg

Contrast ratio

Cr


6

Response time(rise)

Tr

150

250

ms

Response time(fall)

Tr

150

250

ms

Electrical Characteristics

DC Characteristics

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Supply voltage for LCD

VDD-V0

Ta =25℃

-

4.6

-


Input voltage

VDD


4.7

5

5.5

V

Backlight supply voltage

VF


-

-

-


Supply current

IDD

Ta=25℃, VDD=5.0V

-

1.5

2.2


Backlight supply current

IF

VLED=5.0V R=6.8Ω

-

140


mA

Input leakage current

ILKG


-

-

1

uA

“H” level input voltage

VIH


2.2

-

VDD


“L” level input voltage

VIL

Twice initial value or less

0

-

0.6


“H” level output voltage

VOH

LOH=-0.25mA

2.4

-

-

V

“L” level output voltage

VOL

LOH=1.6mA

-

-

0.4


4.jpg

FAQ

1.What is STN LCD ?

A super-twisted nematic display (STN) is a type of monochrome passive-matrix liquid crystal display (LCD).Standard twisted nematic (TN) LCDs with a 90 degrees twisted structure of the molecules have a contrast vs. voltage characteristic unsuitable for passive-matrix addressing as there is no distinct threshold voltage. STN displays, with the molecules twisted from 180 to 270 degrees, have superior characteristics.

2.What is the main advantage of STN LCD ?

The main advantage of STN LCDs is their more pronounced electro-optical threshold allowing for passive-matrix addressing with many more lines and columns. For the first time, a prototype STN matrix display with 540x270 pixels was made by Brown Boveri (today ABB) in 1984, which was considered a breakthrough for the industry.

3.Comparison between STN LCD and TFT displays?

STN LCDs require less power and are less expensive to manufacture than TFT LCDs, another popular type of LCD that has largely superseded STN for mainstream laptops. STN displays typically suffer from lower image quality and slower response time than TFT displays. However, STN LCDs can be made purely reflective for viewing under direct sunlight. STN displays are used in some inexpensive mobile phones and informational screens of some digital products.

3.What are FSTN and FFSTN (DFSTN) ?

· FSTN – Film compensated STN, Formulated STN or Filtered STN. A passive matrix LCD technology that uses a film compensating layer between the STN display and rear polarizer for added sharpness and contrast. It was used in laptops before the DSTN method became popular and many early 21st Century cellphones.

· FFSTN – Double film super-twist nematic

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