4.0-inch Square TFT-LCD Display Module 480×480 SPI RGB

Model: PL040WQI-H401-R4018The 4.0-inch square TFT-LCD display delivers clear, balanced visuals with a 480×480 (RGB) resolution and 262K colors, making it a solid choice for compact embedded interfaces. With a 3SPI Parallel RGB interface and a slim 84.3 × 84.3 × 3.2 mm outline, this module supports efficient integration in space-limited designs. It features the ST7701S driver IC and an 8-LED backlight (4S2P) driven by constant current (IF = 40 mA typ / 45 mA max, VF = 12.8 V typ). A wide operating temperature range (-20 to 70°C) helps ensure stable performance in demanding environments. Application Embedded HMI | Industrial Control | Medical Devices | Instrumentation | Smart Home Panels Customized Options FPC  | Touch Panel | Cover Glass | Controller Board | Brightness UART Display Board for PL040WQI-H401-R4018 Integration Gesight offers a dedicated UART Display solution for the PL040WQI-H401-R4018 4.0-inch 480×480 square TFT-LCD module, providing a clean, plug-and-play path for quick UI bring-up and system validation. The green controller board helps engineers evaluate image quality, brightness, and viewing angles while reducing wiring complexity during early-stage prototyping.Built around the module’s 3SPI Parallel RGB architecture, the board is designed to streamline host communication: developers can send display and control commands through a simple UART link, enabling fast screen initialization, UI updates, and demo playback without heavy driver development on day one. This approach is ideal for rapid proof-of-concept builds, factory test setups, and embedded products that prefer a lightweight serial control path.For projects with mechanical or functional requirements, Gesight can support board customization, including connector alignment, mounting-hole layout, and firmware behavior (boot logo / test patterns / UI demo) to match your enclosure and integration workflow. Capacitive Touch Panel (CTP) Option for PL040WQI-H401-R4018 To enable interactive UI designs on the PL040WQI-H401-R4018 4.0-inch 480×480 square TFT-LCD, Gesight can support an optional Capacitive Touch Panel (CTP) solution for projects that require smooth multi-touch input and a modern user experience. This CTP option is designed for compact embedded devices where touch responsiveness and front-surface durability matter.The touch interface is implemented via a dedicated I²C (SCL/SDA) connection with INT and RESET signals for stable communication and reliable wake/control behavior. The touch controller reference in the module documentation includes GT911, allowing easy MCU integration and straightforward firmware bring-up for common touch functions such as tap, swipe, and gesture-based navigation.For product-level integration, Gesight can also support custom touch lens and cover glass options, including thickness tuning, edge treatment, and optical matching to help align the touch stack with your enclosure design and target UI feel.