1.18″ Circular OLED Display 128×128

Model No. WEO128128B

  • Circular OLED Display
  • Type: Graphic
  • Structure: COG
  • Size: 1.18 inch
  • 128×128 Pixel OLED Module
  • IC：SSD1327
  • 3V Power supply
  • 1/128 duty
  • Interface: 6800, 8080, SPI, I2C
  • Display Color: White / Yellow
  • Support Grayscale
  • Other FPC options available in below table
Categories: ,

Description

Winstar OLED WEO128128B is a Circular passive matrix OLED display which is made of 128×128 pixels, diameter 1.18 inch. The WEO128128B has the module dimension of 37.18×41.23×2.05 mm and Active Area size Ø30 mm; it is built in with SSD1327ZB controller IC and it communicates via 6800/8080 8-bit parallel, I2C and 4-wire SPI serial interface, 3V power supply. The WEO128128B is a COG structure OLED display which is ultra thin and no need of backlight (self emitting); it’s lightweight and low power consumption. This Circular OLED module is suitable for portable instruments, wearable devices, home applications, etc.

WEO128128B 128×128 Pixel OLED Module can be operating at temperatures from -40℃ to +80℃; its storage temperatures range from -40℃ to +85℃. Below is the basic specification of WEO128128B as reference.

 

 

Drawing

Drawing

Winstar 1.18” Circular OLED Display - WEO128128

Data source ref: WEO128128BWAP3N00001

SPECIFICATIONS

SPECIFICATIONS

Interface Pin Function

No. Symbol Function
1 VSS Ground pin. It must be connected to external ground.
2 VCC Power supply for panel driving voltage. This is also the most positive power voltage supply pin. It is supplied by external high voltage source.
3 VCOMH COM signal deselected voltage level.
A capacitor should be connected between this pin and VSS. No external power supply is allowed to connect to this pin.
4 VCI Low voltage power supply and power supply for interface logic level. It should match with the MCU interface voltage level and must be connected to external source.
VCI must always set to be equivalent to or higher than VDD.
5 VDD Power supply pin for core logic operation.
VDD can be supplied externally (within the range of 2.4V to 2.6V) or regulated
Internally from VCI. A capacitor should be connected between VDD and VSS under all circumstances.
6 BS1 MCU bus interface selection pins. Select appropriate logic setting as described in the following table. BS2 and BS1 are pin select.
Bus Interface selection

BS[2:1] Interface
0 4 line SPI
1 I2C
11 8-bit 8080 parallel
10 8-bit 6800 parallel

Note  (1) 0 is connected to VSS  (2) 1 is connected to VCI
7 BS2
8 VSS Ground pin. It must be connected to external ground.
9 IREF This pin is the segment output current reference pin
10 CS# This pin is the chip select input connecting to the MCU.
The chip is enabled for MCU communication only when CS# is pulled LOW (active LOW).
11 RES# This pin is reset signal input.
When the pin is pulled LOW, initialization of the chip is executed.
Keep this pin pull HIGH during normal operation.
12 D/C This pin is Data/Command control pin connecting to the MCU.
When the pin is pulled HIGH, the data at D[7:0] will be interpreted as data.
When the pin is pulled LOW, the data at D[7:0] will be transferred to a command register.
In I2C mode, this pin acts as SA0 for slave address selection.
When 3-wire serial interface is selected, this pin must be connected to VSS.
13 W/R# This pin is read / write control input pin connecting to the MCU interface.
When 6800 interface mode is selected, this pin will be used as Read/Write (R/W#) selection input. Read mode will be carried out when this pin is pulled HIGH and write mode when LOW.
When 8080 interface mode is selected, this pin will be the Write (WR#) input. Data write operation is initiated when this pin is pulled LOW and the chip is selected.
14 RD# This pin is MCU interface input.
When 6800 interface mode is selected, this pin will be used as the Enable (E) signal.
Read/write operation is initiated when this pin is pulled HIGH and the chip is selected.
When 8080 interface mode is selected, this pin receives the Read (RD#) signal. Read operation is initiated when this pin is pulled LOW and the chip is selected.
When serial or I2C interface is selected, this pin must be connected to VSS.
15 D0 These pins are bi-directional data bus connecting to the MCU data bus.
Unused pins are recommended to tie LOW.
When serial interface mode is selected, D0 will be the serial clock input: SCLK; D1 will be the serial data input: SDIN and D2 should be kept NC.
When I2C mode is selected, D2, D1 should be tied together and serve as SDAout, SDAin in application and D0 is the serial clock input, SCL.
16 D1
17 D2
18 D3
19 D4
20 D5
21 D6
22 D7
23 VCC Power supply for panel driving voltage. This is also the most positive power voltage supply pin. It is supplied by external high voltage source.
24 VSS Ground pin.

Mechanical Data

Mechanical Data

Item Dimension Unit
Dot Matrix 128 × 128 Dots
Module dimension 37.18 × 41.23 × 2.05 mm
Active Area Ø30 mm
Pixel Size 0.210 × 0.210 mm
Pixel Pitch 0.235 × 0.235 mm
Display Mode Passive Matrix
Display Color Monochrome
Drive Duty 1/128Duty
Gray Scale 4 bits
IC SSD1327
Interface 6800, 8080, 4 line SPI, I2C
Size 1.18 inch

 

Absolute Maximum Ratings

Absolute Maximum Ratings

Parameter Symbol Min Max Unit
Low voltage power supply, power supply for I/O pins VCI -0.3 4.0 V
Supply Voltage for Logic VDD -0.5 2.75 V
Supply Voltage for Display VCC -0.5 19.0 V
Operating Temperature TOP -40 +80 °C
Storage Temperature TSTG -40 +85 °C

Electronical Characteristics

Electronical Characteristics

DC Electrical Characteristics

Item Symbol Condition Min Typ Max Unit
Low voltage power supply, power supply for I/O pins VCI Note 2.8 3.0 3.3 V
Supply Voltage for Display VCC － 14 14.5 15 V
Supply Voltage for Logic VDD － 2.4 － 2.6 V
High Level Input VIH － 0.8×VCI － VCI V
Low Level Input VIL － 0 － 0.2×VCI V
High Level Output VOH － 0.9×VCI － VCI V
Low Level Output VOL － 0 － 0.1×VCI V
50% Check Board operating Current VCC =14.5V － 24 26 mA

Note: VCI must be larger than or equal to VDD

 

FPC Options:

FPC Options:

Drawing FPC Length PIN Pitch ZIF / HOTBAR FPC Interface FPC No. Create Date
FPC2050002411XXXXX02_WEO128128BLPP3N00000.png 25.05 24 0.5 ZIF 6800,8080,SPI,I2C FPC2050002411XXXXX02 20160511
FPC2050001811XXXXX04_WEO128128DWPP3D00001 91 18 0.5 ZIF 4-line SPI , I2C FPC2050001811XXXXX04 20180705

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