The 1.28-inch 240x240 resolution circular LCD display is a small-size display component designed for compact devices. Its unique circular appearance and high resolution make it an ideal choice for smart watches, fitness trackers, and other portable or wearable electronic products. Here are some details and technical features about this display:
Technical Specifications
Screen Size: With a diameter of 1.28 inches (about 32.5 mm), the circular design is ideal for products that require a unique appearance.
Resolution: 240x240 pixels, providing clear and detailed text and image display, suitable for menu navigation, icons, and small-scale graphic content.
Interface Type: Usually uses SPI (Serial Peripheral Interface) interface, which is a synchronous serial communication protocol that allows efficient data transfer between microcontrollers and peripheral devices. In addition, some models may also support other interfaces such as I2C or parallel interfaces.
Display Technology: Some displays use IPS (In-Plane Switching) screen technology, which ensures a wide viewing angle and excellent color reproduction, allowing a good visual experience when viewed from different angles.
Color depth: Supports 65K colors (16-bit color depth) to display rich colors for vivid and lifelike images.
Display Features
Built-in driver chip: Most of these displays are equipped with a dedicated LCD driver chip, such as ST7789 or GC9A01, which simplifies hardware design and reduces the need for external components.
Backlight control: With LED backlight, users can adjust the brightness according to ambient lighting conditions to optimize visibility and power consumption.
Touch function (optional): Some models may also integrate capacitive or resistive touch screens, increasing the possibility of user interaction.
Application areas
Such displays are widely used in many fields, including but not limited to:
Smart watches and other wearable devices
Small medical instruments
Internet of Things (IoT) devices
Home automation control panels
Portable payment terminals such as mobile POS machines
Development considerations
Power management: Considering the issues of portability and battery life, an effective power management system is essential to extend the working time of the device.
Development tools and support: It is important to choose products with good documentation and technical support. Sample code, library functions, and development boards provided by manufacturers can help speed up the development process.
Graphics library: To simplify the development process, you can use existing graphics libraries (such as LVGL, uGFX, etc.), which provide functions such as drawing lines, rectangles, text, and even support more complex GUI elements.
Physical connection: Make sure that the main control board has enough pins to connect the SPI interface, and pay attention to the impact of signal line length on signal integrity.
Actual case
For example, Waveshare provides a 1.28-inch circular TFT LCD display with a resolution of 240x240, using the ST7789 driver IC, supporting 65K colors, suitable for a variety of application scenarios. This display has good color performance and wide viewing angle, making it an ideal choice for smart watches and other small devices.
In summary, the 1.28-inch 240x240 resolution circular LCD display has become an ideal display solution for many small devices due to its compact design, high resolution, and good color performance. When choosing a specific display, be sure to consult the detailed specifications and technical documents provided by the manufacturer to ensure that the selected display meets your project needs. In addition, evaluating samples or reference designs is also a good way to ensure compatibility and performance.
