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Introduction
The demand for compact, high-resolution displays is rapidly growing in sectors like wearables, smart home devices, and portable medical instruments. The SFTO109HD-8991A-N from Saef Technology Limited is a 1.09-inch round TFT LCD that combines an elegant circular form factor with impressive technical performance. This article explores the key specifications that make this display an ideal choice for space-constrained and design-sensitive applications.
Superior Optical Performance in a Compact Design
This circular TFT module features a 240x240 RGB resolution, delivering sharp and vibrant visuals with support for up to 262K colors. The display offers a wide 80-degree viewing angle in all directions, ensuring consistent image quality from various perspectives. With a typical brightness of 200 cd/m² and a high contrast ratio of 500:1, it provides excellent readability in both indoor and outdoor lighting conditions. The circular active area of 27.79mm diameter makes it perfect for applications where traditional rectangular displays would compromise design aesthetics.
Efficient Interface and Power Management
The display utilizes a 4-wire SPI interface, ensuring simple integration with popular microcontrollers such as ARM Cortex-M series and ESP32 platforms. Powered by the GC9A01 driver IC, it maintains stable performance while operating at a low supply voltage of 2.8V-3.2V. The typical current consumption of just 10mA makes it particularly suitable for battery-powered devices where energy efficiency is critical. The integrated LED backlight system, featuring two parallel-connected LEDs, provides uniform illumination while maintaining power efficiency.
Reliability for Demanding Applications
Saef Technology Limited has engineered this display to withstand challenging environmental conditions. With an operating temperature range of -10°C to +60°C and storage capability from -20°C to +70°C, it performs reliably in various climates. Comprehensive reliability testing, including temperature cycling, vibration resistance, and humidity endurance, ensures long-term stability. The module complies with RoHS environmental standards, meeting the regulatory requirements for international markets.
Conclusion
The SFTO109HD-8991A-N from Saef Technology Limited represents an excellent fusion of form and function, offering designers a premium circular display solution without compromising on performance. Its compact dimensions, efficient power consumption, and robust construction make it ideal for next-generation compact devices. Explore the complete technical specifications at www.saefdisplay.com.

