1.5 inch 128×128 COG Graphic OLED Display

Model No. WEO128128H

  • Type: Graphic
  • Structure: COG
  • Size:1.5 inch
  • 128 x 128 Dot Matrix
  • IC：CH1120
  • 3V Power supply
  • 1/128 Duty
  • Interface: 8080,SPI,I2C
  • Display Color: White / Yellow
  • Support Grayscale
Categories: ,

Description

WEO128128H is a 1.5-inch COG Graphic OLED display featuring 4-bits grayscale function; made of resolution of 128×128 pixels. This module is built-in with CH1120 IC; it supports 8080, SPI, I2C interface, 1/128 driving duty, the supply voltage for Logic is 3V (VDD), and the supply voltage for display is 12V. The current with 50% checkerboard display is 20mA @ VCC 12V for white and 14.5V for yellow.

WEO128128H is a COG structure OLED display module that is lightweight, low power, and very thin. It is suitable for smart home applications, Cloud/IoT systems, handheld instruments, intelligent technology devices, energy systems, automotive, communication systems, medical instruments, etc. WEO128128H OLED module can be operated at temperatures from -40℃ to +80℃; its storage temperatures range from -40℃ to +85℃.

 

Drawing

Drawing

1.5 inch OLED, 128x128 SPI OLED Display - WEO128128H

Data source ref:WEO128128HLAP3N00000

SPECIFICATIONS

SPECIFICATIONS

Interface Pin Function

No. Symbol Function
1 ESD_GND This pin should be connected to GND.
2 VPP This is the most positive voltage supply pin of the chip.
It should be supplied externally.
3 VCOMH This is a pin for the voltage output high level for common signals.
A capacitor should be connected between this pin and GND.
4 VDD Power supply for logic
5 NC No connection
6 IM1 These are the MPU interface mode select pins.

8080 3-wire SPI 4-wire SPI I2C
IM1 1 0 0 1
IM2 1 1 0 0

These pins must be connected to “H” or “L”.
7 IM2
8 VSS Ground for logic and analog. This pin should be connected to GND externally.
9 IREF This is a segment current reference pin.
A resistor should be connected between this pin and GND.
10 CSB This pin is the chip select input. When CSB = “L”, then the chip select becomes active, and data/command I/O is enabled.
When in I2C interface, this pin is not used, so it must be connected to “L”.
11 RESB This is a reset signal input pin. When RESB is set to “L”, the settings are initialized. The reset operation is performed by the RESB signal level. This pin internal pull high.
12 A0 This is the Data/Command control pin that determines whether the data bits are data or a command.
A0 = “H”: the inputs at D0 to D7 are treated as display data
A0 = “L”: the inputs at D0 to D7 are transferred to the command registers.
In I2C interface, this pin serves as SA0 to distinguish the different address of OLED driver.
When in 3-wire interface, this pin is not used, so it must be connected to “L”.
13 WRB This is a MPU interface input pin.
When connected to an 8080 MPU, this is active LOW. This pin connects to the 8080 MPU WR signal. The signals on the data bus are latched at the rising edge of the WR signal
When in 3-wire.4-wire & I2C interface, this pin is not used, so it must be connected to “L”.
14 RDB This is a MPU interface input pin.
When connected to an 8080 series MPU, it is active LOW. This pin is connected to the RD signal of the 8080 series MPU, and the data bus is in an output status when this signal is “L”.
When in 3-wire.4-wire & I2C interface, this pin is not used, so it must be connected to “L”.
15 D0 This is an 8-bit bi-directional data bus that connects to an 8-bit or 16-bit standard MPU data bus.
When the serial interface(SPI) and I2C is selected, then D0 serves as the serial clock input pin (SCL) and D1 serves as the serial data input pin (SI). At this time, D2 to D7 are set to high impedance. D7~D2 is recommended to connect the VDD or GND. It is also allowed to leave D7~D2 unconnected.
16 D1
17 D2
18 D3
19 D4
20 D5
21 D6
22 D7
23 VPP This is the most positive voltage supply pin of the chip
It should be supplied externally.
24 ESD_GND This pin should be connected to GND.

Mechanical Data

Mechanical Data

Item Dimension Unit
Dot Matrix 128 × 128 dots
Module dimension 33.80 x 36.50 x 2.01 mm
Active Area 26.86 x 26.86 mm
Pixel Size 0.185 x 0.185 mm
Pixel Pitch 0.210 x 0.210 mm
Display Mode Passive Matrix
Display Color Monochrome
Drive Duty 1/128 Duty
Gray Scale 4 bits
IC CH1120
Interface 8080,SPI,I2C
Size 1.5 inch

Absolute Maximum Ratings

Absolute Maximum Ratings

Parameter Symbol Min Max Unit
Supply Voltage for Logic VDD -0.3 3.5 V
Supply Voltage for Display VPP -0.3 15.0 V
Operating Temperature TOP -40 +80 °C
Storage Temperature TSTG -40 +85 °C

 

Electronical Characteristics

Electronical Characteristics

Item Symbol Condition Min Typ Max Unit
Supply Voltage for Logic VDD － 1.65 3.0 3.3 V
Supply Voltage for Display VPP － 8.0 14.5 15.0 V
High Level Input VIH － 0.8×VDD － VDD V
Low Level Input VIL － GND － 0.2×VDD V
High Level Output VOH － 0.8×VDD － VDD V
Low Level Output VOL － GND － 0.1×VDD V
Display 50% Pixel on IPP VPP=14.5V － 20 30 mA

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