CH1115 4P 48X88 I2C 0.5 Inch Round OLED LCD Display Module

CH1115 0.5 Inch Round OLED Display Module (48×88, I2C) is a unique, ultra-compact display solution that brings vibrant, high-contrast visuals to small, wearable, or portable electronics projects. This module utilizes the CH1115 driver IC to manage a circular matrix of 48×88 pixels, a non-standard resolution that designers deliberately shaped to fit the 0.5-inch round form factor. Consequently, this OLED offers perfect integration into aesthetically sensitive applications like smart rings, watches, or miniature gauges, eliminating the square look of traditional displays. Furthermore, the I²C communication protocol simplifies wiring significantly, requiring only four pins (VCC, GND, SCL, SDA) to connect to any microcontroller. You will find that this self-emitting OLED delivers superior readability in all lighting conditions due to its high brightness and near-180° viewing angle.

Key Features:

• Unique Round Form Factor: The 0.5-inch circular display panel is ideal for creating aesthetically pleasing, non-traditional user interfaces in compact devices.
• High Contrast & Clarity: As an OLED, it features infinite contrast, delivering deep blacks and vivid colors with excellent visibility indoors and outdoors.
• Ultra-Low Power Consumption: The self-emitting nature of OLEDs means the module draws minimal current, particularly when displaying dark content, making it perfect for battery-powered devices.
• Simple I²C Interface: The 4-pin connection (IIC) minimizes the required number of GPIO pins on your host microcontroller, simplifying hardware design significantly.
• CH1115 Driver IC: This dedicated chip manages the unique circular pixel mapping and display memory, offering robust command-set control.

Technical Specifications:

• Display Technology: Passive Matrix Organic Light Emitting Diode (PMOLED)
• Driver IC: CH1115
• Resolution: 48 x 88 pixels (Circular Matrix)
• Display Size (Diagonal): 0.5 inches (≈ 12.7 mm)
• Color Depth: Monochrome (typically White or Blue)
• Interface Protocol: I²C (IIC)
• Operating Voltage (VDD): 3.3 V to 5.0 V (Logic and Display Power)
• Operating Temperature Range: −30°C to +70°C

Mechanical Specifications:

• Module Dimensions: Highly compact PCB size, determined by the round display area.
• Module Mounting: Designed for surface integration, often with header pins provided.
• Panel Material: Glass substrate with protective acrylic cover.
• Viewing Angle: Virtually ≈ 160° (Wide viewing angle characteristic of OLED technology).

Dimensions:

• Overall Module Length: ≈ 27.0 mm
• Overall Module Width: ≈ 27.0 mm
• Display Area Diameter: 0.5 inches (≈ 12.7 mm)
• Pin Header Pitch: 2.54 mm (Standard)
• Module Weight: < 2 g (Extremely light for wearables)

Pinout and Wiring:

• GND: Connect to the circuit ground reference (0V).
• VCC: Connect to the positive power supply (3.3V to 5V).
• SCL: I²C Clock Line. Connect to the host microcontroller’s SCL pin.
• SDA: I²C Data Line. Connect to the host microcontroller’s SDA pin.
• Wiring Note: Ensure proper pull-up resistors are used on the SCL and SDA lines if the host microcontroller does not include them internally.

Datasheet Reference:

• Download CH1115 OLED Driver Datasheet

Commonly Used in:

• Smart Rings and Pendants: The circular design is perfect for displaying minimal status information or time in jewelry-based wearables.
• Miniature Gauges: Used in hobbyist flight controllers, remote vehicle dashboards, and small electronic testing devices.
• Custom Wearable Tech: Integrating seamlessly into watch faces or specialized personal monitoring devices.

Applications:

• Status Indicators: Displaying battery life, connection status (Wi-Fi/Bluetooth), or simple alerts.
• Time and Date Display: Serving as the main time-keeping interface in small clocks or smart devices.
• Data Visualization: Presenting numerical data, bar graphs, or custom icons in embedded sensor logging applications.

Equivalent Models:

• SSD1306/SSD1309 Modules: Although primarily rectangular, these widely used OLED drivers offer similar I²C interfacing and monochrome quality, however, they do not provide the circular form factor.
• SH1106 Driver: Another common OLED driver compatible with I²C, often used in square or rectangular modules, but offering similar software libraries.
• Custom Round OLEDs: Other manufacturers produce custom round OLEDs, therefore, checking driver compatibility is necessary if cross-referencing.

Package Includes:

• 1 x CH1115 0.5 Inch Round OLED Display Module (48×88)