Model: PO139FN01FThe 1.39-inch Flexible/Bendable LTPS-AMOLED Module delivers vivid, high-contrast visuals in a true round form factor, featuring a 400×400 resolution and 16.7M colors (24-bit) for sharp UI rendering and smooth gradients. With typ. 300 cd/m² luminance and wide viewing performance (80° L/R/U/D, CR > 1600), it maintains clear readability across different angles. Using a MIPI (CMD mode) interface and supporting a 60 Hz normal refresh operation, it’s ideal for compact, design-forward devices that need a clean circular display. Its slim outline of 38.6 × 40.5 × 0.7 mm (typ., w/o FPCa) and Ø35.4 mm active area simplify integration, while the −20 to 60°C operating range supports dependable real-world use. Application Smart Watches | Wearable Devices | Round UI Dials | IoT Controllers | Portable Instruments | Compact Embedded Displays Customized Options FPC  | Touch Panel | Cover Glass | Controller Board | Brightness HDMI Controller Board for PO139FN01F Flexible/Bendable OLED Evaluation Gesight provides an HDMI controller board tailored for the PO139FN01F demo setup, giving engineers a fast, practical way to bring the OLED up on the bench without writing display drivers first. With standard HDMI video input, you can quickly verify 400×400 UI rendering, check text and icon edge clarity, and review gradient smoothness and overall color performance in real time—ideal for early-stage concept validation and demo builds.For development and integration, the HDMI board acts as a stable bridge between a PC/video source and the module’s MIPI (CMD mode) interface, helping reduce bring-up risk and iteration time. It’s especially useful when tuning round dial layouts, evaluating readability at different angles, and confirming mechanical fit with the module’s compact form factor before moving to the final system architecture.Gesight can also support board-level setup guidance and matching connection solutions for rapid evaluation, making it easier to transition from prototype testing to product integration. Dynamic Image Switching Test for flexible/bendable OLED Validation This GIF showcases the PO139FN01F 1.39-inch Flexible/Bendable OLED running a rapid content-switching test, cycling through different images to verify stable refresh behavior and consistent rendering on a round display. It helps quickly confirm color transitions, gradient smoothness, and edge clarity within the circular active area—useful for early-stage UI demo tuning and basic reliability checks during bring-up.