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0.42 to 2.4inch oled display , and 0.91 ,0.96,1.3 inch oled is most popular size

Manufacturing and Application Scenarios of Small OLED Display Modules

Small OLED modules typically refer to displays ranging from 0.42 inches to 2.4 inches. Below are the most widely used sizes and their typical resolutions.

1. Ultra-small Size (0.42" – 0.87")
  • 0.42 inch (72×40)
  • 0.49 inch (64×32)
  • 0.66 inch (64×48)
  • 0.69 inch (96×16)
  • 0.87 inch (128×32)
2. Mainstream Standard Size (0.91" – 1.54")
  • 0.91 inch (128×32)
  • 0.96 inch (128×64) – the most popular
  • 1.3 inch (128×64 or 128×96)
  • 1.54 inch (128×64)
3. Medium Size (1.8" – 2.42")
  • 1.8 inch (128×160)
  • 2.0 inch (128×160, 240×128)
  • 2.42 inch (128×128, 128×160)
4. Round OLED Sizes
  • 0.75 inch (128×128)
  • 1.19 inch / 1.39 inch / 1.4 inch
  • 1.5 inch round (240×240, 320×320)
1. Manufacturing Process

The production is divided into front-end panel manufacturing, back-end module assembly and testing & delivery.

1.1 Front-end Panel Manufacturing
  1. Substrate Cleaning

    Ultrasonic and plasma cleaning of glass substrates to remove oil and dust.

  2. Electrode Fabrication

    Sputtering ITO transparent anodes and forming pixel electrode patterns via photolithography and etching.

  3. Organic Layer Evaporation

    Sequential vacuum evaporation of organic films:

    Hole Injection Layer → Hole Transport Layer → Emissive Layer → Electron Transport Layer → Electron Injection Layer.

  4. Cathode Deposition

    Evaporation of metal cathodes (Al/MgAg alloy) to form light-emitting pixels.

  5. Encapsulation

    Sealing with glass cover and desiccant to isolate moisture and oxygen.

  6. Cutting & Initial Inspection

    Cutting large glass sheets into small sizes and testing for defective panels.

1.2 Back-end Module Assembly
  1. Driver IC Bonding (COG/COF)

    Thermocompression bonding of driver ICs (SSD1306, SH1106, etc.) onto the panel.

  2. FPC Bonding

    Bonding flexible printed circuits to export power and control signals (I2C/SPI).

  3. PCB Integration

    Mounting capacitors, resistors and integrating FPC with PCB.

  4. Functional Testing

    Communication verification, full-screen lighting, grayscale, dead pixel and ghosting tests.

  5. Aging & Packaging

    Aging screening, film pasting, pin installation and final packaging.

2. Application Scenarios

Small OLED modules feature ultra-thin, self-luminous, low power consumption, ideal for compact and portable devices.

2.1 Smart Wearables
  • Smart bracelets and watches
  • TWS earbud charging case displays
  • Health monitoring wearables
2.2 Medical & Healthcare Devices
  • Oximeters, electronic blood pressure monitors
  • Blood glucose meters, thermometers
  • Portable ECG monitors, massagers
2.3 Smart Home & Small Appliances
  • Smart thermostats and floor heating panels
  • Smart door locks and access controllers
  • Air purifiers, humidifiers, electric cups
  • Smart water, electricity and gas meters
2.4 Consumer Electronics & Audio
  • Bluetooth speakers, amplifiers and sound cards
  • Portable MP3 and music players
  • Voice recorders and walkie-talkies
2.5 Industrial & Instrumentation
  • Portable multimeters and oscilloscope secondary screens
  • Sensor displays (temperature, humidity, CO₂, PM2.5)
  • Power supplies and battery testers
  • Industrial control modules and inverters
2.6 Automotive & Mobility
  • E-scooter and electric vehicle dashboards
  • OBD vehicle speed and voltage monitors
  • Tire pressure monitoring systems
2.7 Makers & DIY Electronics
  • Arduino, ESP32, STM32 development projects
  • 3D printer and laser engraver status screens
  • Mini clocks and weather stations
  • Retro mini game consoles
2.8 Security & Office Equipment
  • Access control and time clocks
  • Label printers and small POS printers
  • Alarm and camera status displays