COG LCD Arduino

COG LCD Arduino

COG LCD arduino
COG LCD arduino ADM12864A19
Model No. ADG12864A19
►128x64 COG display
►Graphic LCD

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Product Details

COG LCD arduino

COG LCD arduino ADM12864A19

Model No. ADG12864A19

►128x64 COG display

►Graphic LCD

►Built-in controller UC1701X

►5V power supply

►1/65 Duty, 1/9 Bias

►Interface : 4-wire Serial Interface MPU

Description of COG LCD arduino ADM12864A19

COG LCD arduino are monochromatic passive or active matrix LCD displays that can display information as text or in a dot matrix pattern. Since COG LCD arduinos don't have a built-in PCB board, the IC is directly mounted on the glass of the display.

1. FEATURES

The features of LCD are as follows

* Display mode : FSTN, Positive, Transflective

* Color : Display dot : Balck

Background: white

* Display Format : 128 X 64 Dots

* IC : Ultra Chip: UC1701X

* Interface Input Data : 4-wire Serial Interface MPU

* Driving Method : 1/65Duty, 1/9Bias

* Viewing Direction : 6 O’clock

* Backlight : WHITE

2. MECHANICAL SPECIFICATIONS

Item

Specification

Unit

Module Size

39.3(W) x 25.8(H)

mm

Viewing Area

36.32MIN(W) x 18.62MIN(H)

mm

Effective Display Area

34.92(W) x17.45(H)

mm

Character Font

128 x 64 Dots

-

Dot Size

0.253(W) X 0.253(H)

mm

Dot Pitch

0.273(W) X 0.273 (H)

mm

3. ELECTRICAL SPECIFICATIONS (Continued)

3-2. Electrical Characteristics (Vss=0V)

Item

Symbol

Test
Condition

Min.

Typ.

Max.

Unit

Logic Supply Voltage

VDD – VSS

Ta=0~50°C

2.4

3.0

3.3

V

LCD Drive Voltage
(Recommended Voltage)

VOP=V0–VSS

Ta=25°C

8.7

9.0

9.3

V

Input Voltage

“H” Level

V IH

VDD=3.3V65%

0.8VDD

-

-

V

“L” Level

V IL

-

-

0.2VDD

V

Output oltage

“H” Level

V oH

VDD=3.3V65%

0.8VDD

-

-

V

“L” Level

V oL

-

-

0.2VDD

V

Current Consumption

IDD

VDD=3.3V65%
V0-VSS=9.5V

-

0.11

2.0

mA

NOTE: 1) Duty Ratio=1/65, Bias Ratio=1/9      2) Measuring in Dots ON-state

4. BLOCK DIAGRAM

Reference circuit using internal HV generator circuit

4(002).jpg

5. ELECTRO – OPTICAL CHARACTERISTICS

Item

Symbol

Temp.

Min.

Typ.

Max.

Unit

Conditions

Note

Viewing
Angle

Θ2 –Θ1

25℃

30

70

-

Deg.

-

1,2

Φ

60

80

-

Contrast
Ratio

Cr

25℃

2

5

-

-

Θ=0°
Φ=0°

3

Response
Time(rise)

Tr

25℃

-

140

250

ms

Θ=0°
Φ=0°

4

0℃

-

950

1150

Response
Time(fall)

Tf

25℃

-

222

250

ms

Θ=0°
Φ=0°

4

0℃

-

950

1150

Note1 . Definition of Angle Θ&Φ

Note2. Definition of Viewing Angle Θ1&Θ2

1(001).jpg

2(001).jpg

Note3 . Definition of Contrast Cr

Note4. Definition of Optical Response

3(001).jpg

4(001).jpg

6. TERMINAL PIN FUNCTION

6-1. Interface Pin Function Description

Pin NO.

Symbol

I / O

Functions

1

CS0

I

Chip Select or chip address.

2

RST

I

When RST=”L”, all control registers are re-initialized by their default states.
Since UC1601 has built-in Power-on Reset and Software Reset command, RST pin is not required for proper chip operation.

3

CD

I

Select the incoming command if it is a control instruction or for display data.

4

SCK

I/O

Bi-directional bus for both serial and parallel host interfaces.

5

DATA

6

VDD

Power

VDD supplies for display data RAM and digital logic.

7

VSS

Ground

Ground. Connect VSS and VSS2 to the shared GND pin.

8

VB0+

I

LCD Bias Voltage. These are the voltage sources to provide SEG driving currents. These voltages are generated internally. Connect capacitors of CBX value between VBX+ and VBX-.
In COG application, the resistance of these ITO traces directly affects the SEG driving strength of the resulting LCD module. Minimize these trace resistance is critical in achieving high quality image.

9

VB0-

 

10

VB1-

 

11

VB1+

-

12

VLCD

Power

LCD Power Supply.

OUTLINE DIMENSION

5.jpg

6.jpg

FAQ

1.What is FSTN LCD ?

Answer :FSTN (Film-compensated Super-twisted Nematic) provides a sharper contrast than STN by adding a film. The cost is approximately 5% higher than STN. FSTN works great for indoor and outdoor applications and is mainly used in graphic displays and higher end products.

2.How can I reduce the LCD signal noise?

Noise on an LCD signal can be reduced with a termination resistor and capacitor that can be tuned to the cable characteristics. This will allow you to soften the edges and reduce the noise. If the screen tears sideways, there is generally a problem with noise on the horizontal sync signal causing irregular resets to the left-hand side of the screen. If you see a vertical rolling effect, it is generally noise on the vertical sync line or a missing sync signal.

3.Are initialization codes available for Amotec LCD displays?

The initialization codes can be found in the LCD specification, and or in the controller specification.

4.What is a serial interface?

A serial interface is a communication interface between two digital systems that transmits data as a series of voltage pulses down a wire. A "1" is represented by a high logical voltage and a "0" is represented by a low logical voltage. Essentially, the serial interface encodes the bits of a binary number by their "temporal" location on a wire rather than their "spatial" location within a set of wires. Encoding data bits by their "spatial" location is referred to as a parallel interface and encoding bits by their "temporal" location is referred to as a serial interface. Figure 3 graphically illustrates the difference between these two communication methods.

Figure 3: Difference between parallel and serial interfaces

7.jpg

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