GC9B72 10P 360X360 SPI 2.1 Inch Round Display Module

GC9B72 10P 360X360 SPI 2.1 Inch Round Display Module is a high-resolution circular TFT LCD panel engineered for modern smart wearables, automotive meters, and interactive IoT devices. This module integrates the advanced GC9B72 display driver IC, which renders rich 65K/262K colors across a crisp 360×360 pixel grid. Furthermore, its high-speed 4-wire SPI interface allows microcontrollers to refresh graphics rapidly while minimizing the required GPIO pin count. Consequently, developers can integrate smooth gauges, animations, and clean user interfaces into space-constrained projects. Therefore, this compact round display serves as an ideal visual interface for microcontrollers such as ESP32, STM32, Arduino, and Raspberry Pi Pico.

Key Features:

• High-Definition Resolution: Displays 360×360 pixels on a 2.1-inch circular active area, providing crisp text and vivid graphical elements.
• Efficient SPI Communication: Utilizes a 4-wire serial peripheral interface to achieve fast data transmission while conserving microcontroller I/O pins.
• Wide Viewing Angles: Employs IPS technology to ensure color accuracy and contrast consistency from angles up to ≈ 160°.
• Rich Color Depth: Supports 16-bit RGB (65K colors) and 18-bit RGB (262K colors) for vibrant user interface designs.
• Compact 10-Pin Interface: Features a streamlined 10-pin connector layout that simplifies PCB routing and integration into tight enclosures.

Technical Specifications:

• Driver IC: GC9B72
• Screen Size: 2.1 Inch diagonal
• Resolution: 360 x 360 pixels
• Display Interface: 4-Wire SPI
• Operating Voltage (Logic): 3.3 V ±5%
• Operating Voltage (Backlight): 3.0 V to 3.3 V
• Display Type: IPS TFT LCD
• Operating Temperature: -20°C to +70°C

Mechanical Specifications:

• Screen Shape: Circular / Round
• Pin Count: 10-Pin FPC / Header Connection
• Backlight Type: White Light Emitting Diode (LED)
• Mounting Method: Panel flush mount or bezel frame integration

Dimensions:

• Active Area (AA) Diameter: ≈ 53.34 mm
• Module Outline Diameter: ≈ 56.0 mm
• Module Thickness: ≈ 2.5 mm
• Weight: ≈ 12.0 g

Pinout and Wiring:

• GND: Connects to common system ground.
• VCC: Supplies 3.3V logic and driver power.
• SCL: Serial clock signal line for SPI synchronization.
• SDA: Serial data input line for commands and pixel transmission.
• RES: Active-low reset pin to initialize the display controller.
• DC: Data/Command selection pin (however, some controllers refer to this as RS).
• CS: Active-low chip select line to enable SPI communication.
• BLK: Backlight control pin (supports PWM for dynamic brightness adjustment).
• NC / GND: Secondary ground or no connection pin depending on board revision.
• NC: Reserved pin for factory calibration.

Datasheet Reference:

• Download GC9B7x Series Controller Datasheet

Commonly Used in:

• Smart Wearables: Serving as the primary circular screen for custom DIY smartwatches and fitness trackers.
• Automotive Gauges: Displaying vehicle speed, engine RPM, or battery statistics in custom digital instrument clusters.
• Smart Home Thermostats: Providing a modern rotary visual interface for climate controllers and smart knobs.

Applications:

• Rotary Encoder Displays: Housing inside center-dial knobs to create interactive physical control panels.
• Industrial Monitoring: Indicating pressure, flow rate, and temperature readouts on circular analog-style digital meters.
• Audio Equipment: Rendering graphic equalizers and volume dials for custom audio amplifiers and DAC systems.

Equivalent Models:

• GC9A01 1.28 Inch Round Display: A smaller 240×240 circular module from the same controller ecosystem for miniature projects.
• ST7789 1.3 Inch IPS Module: A popular alternative SPI controller, although it typically features a square active area.
• ST77916 360×360 Round TFT: A direct high-resolution circular alternative sharing similar pixel density and SPI interfacing.

Package Includes:

• 1 x GC9B72 10P 360X360 SPI 2.1 Inch Round Display Module