The 1.28-inch 240x240 resolution circular LCD panel is a small-size display component designed for compact devices. Its unique round 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 panel:
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 form factor.
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, there are also cases where MCU interfaces are used.
Display Technology: Some panels 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. IPS technology also brings higher contrast and more vivid colors.
Color depth: Supports 65K colors (16-bit color depth) to display rich colors for vivid and lifelike images.
Panel features
Built-in driver chip: Most panels of this type are equipped with a dedicated LCD driver chip, such as the 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 light conditions to optimize visibility and power consumption. Some panels have a backlight life of more than 20,000 hours.
Touch function (optional): Some models may also integrate capacitive or resistive touch screens, increasing the possibility of user interaction.
Application areas
Such panels are widely used in a variety of 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 machines1
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 codes, 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 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.
