1.28-inch square LCD screens are widely used in smart watches, portable medical devices, personal health monitoring instruments, and other small electronic devices due to their small size and moderate resolution. Not only do these screens provide enough display area to present important information, but their low power consumption is also very suitable for battery-powered applications. Here is a more detailed introduction to this 1.28-inch square LCD screen:
Screen Features
Dimensions and Resolution
Dimensions: 1.28 inches diagonal length, ideal for applications that require compact design.
Resolution: There are different resolutions on the market, including but not limited to 176x176 pixels2
and 240x240 pixels7
. Higher resolutions provide clearer text and image display effects, suitable for applications that require fine display.
Screen Ratio
Screen Ratio: Nearly square ratio (actually 1:1), which makes it particularly suitable for wearable devices with round or square designs, such as smart watches or fitness trackers.
Display Technology
TFT-LCD: Thin Film Transistor Liquid Crystal Display, which ensures good image quality, including bright colors and high contrast. This is particularly important for outdoor use, as visibility is maintained even in strong sunlight.
IPS Panel: Some models may use IPS technology, which provides wider viewing angles and more realistic color reproduction. Although TN panels are more common due to their lower cost and faster response time, IPS may be a better choice in cases where visual experience is advantageous2
.
Interface Type
SPI Interface: Supports data transmission via the Serial Peripheral Interface, which is a common communication method, especially suitable for resource-constrained microcontroller platforms. The SPI interface is known for its simplicity and efficient data transmission speed16
.
RGB Interface: Some models may also provide an RGB interface option, allowing more direct color control, suitable for application scenarios that require higher color accuracy.
MCU Interface: Can be directly connected to a microcontroller unit (MCU), simplifying the system integration process and facilitating the development of embedded systems5
.
Physical parameters
Active display area: For a screen with a resolution of 176x176, the active area is approximately 26.862mm x 26.86mm 2
; for a screen with a resolution of 240x240, it is approximately 23.4mm x 23.4mm 5
.
Dimensions: The size of the entire module varies depending on the specific model, but is generally compact, such as 33.8mm x 36.5mm x 1.41mm or smaller1
.
Backlight control: The BLK pin can accept a PWM signal to adjust the brightness, thereby saving energy and extending battery life1
.
Power consumption characteristics
Low power consumption: For example, some products use a low power design, making them ideal for small devices that rely on battery power17
.
Application scenarios
Due to its compact size and appropriate resolution, the 1.28-inch square LCD screen is very suitable for the following applications:
Smart wearable devices: such as smart watches, bracelets and other personal health monitoring instruments.
Portable medical devices: such as small medical tools such as blood glucose meters and pulse oximeters.
Consumer electronics accessories: such as display screens on headphones, remote controls, etc.
Industrial automation: small HMI (human-machine interface), sensor reading display, etc. 3
.
Selection suggestions
When choosing a specific 1.28-inch square LCD screen, please consider the following factors:
Performance requirements: Decide which display technology (TN vs IPS) to choose based on whether your project requires high refresh rate, full viewing angle or other special features.
Interface compatibility: Confirm whether the interface of the selected screen (such as SPI or RGB) can be seamlessly connected with the existing microcontroller or main control board.
Power consumption considerations: Especially for battery-powered products, choosing a low-power screen can significantly extend battery life.
Cost-effectiveness: Balance the relationship between budget constraints and required functional features to find the most cost-effective solution.
