Introduction
This document outlines the specifications for the LSC055I18-MP-V1, a versatile 5.5-inch TFT LCD module from LESSON Smart Display. Featuring a high-resolution 720x1440 HD+ display and a unique transflective design, this module is engineered for applications that operate under varying ambient light conditions. Driven by the ST7703I-G5-DP controller with a MIPI interface, it offers both a high-brightness transmissive mode and a ultra-low-power reflective mode, making it ideal for outdoor portable devices, rugged handheld terminals, and power-sensitive IoT equipment.
Key Specifications
- Brand & Model: LESSON Smart Display LSC055I18-MP-V1
- Screen Size: 5.5 inches (diagonal)
- Active Area: 120.96 mm (W) × 60.48 mm (H) Note: This yields a tall aspect ratio; orientation should be confirmed from the full mechanical drawing.
- Driver IC: ST7703I-G5-DP
- Display Technology: a-Si TFT LCD with Transflective capability
- Display Mode: 16.7M Color TFT, Transmissive & Reflective, Normally Black
- Display Resolution: 720(H) × 3(RGB) × 1440(V) pixels (HD+)
- Interface: MIPI DSI (4 Data Lanes)
- Display Colors: 16.7 Million Colors
- Module Outline Dimensions: 70.7 mm (W) × 141.8 mm (H) × 3.02 mm (D) (Typical)
- Viewing Direction: All Free
- Luminance (Transmissive Mode): 80 cd/m² + 8.5% of ambient illumination
- Luminance (Reflective Mode): 8.5% of ambient illumination
- Module Power Consumption: 0.986 W (Transmissive Mode), 0.146 W (Reflective Mode)
- Operating Temperature: -20°C to +70°C
- Storage Temperature: -30°C to +80°C
- Backlight: 14-chip white LED (Drive condition: If=40mA, Vf=22.4V Typ.)
- Touch Panel: Integrated Capacitive Touch Panel (CTP), IC: CHSC5448A, Structure: G+F+F.
General Description
The LSC055I18-MP-V1 is a highly specialized module distinguished by its transflective display technology. This allows it to operate in two distinct modes based on ambient light: Reflective Mode (using ambient light, backlight OFF) for ultra-low power consumption and optimal sunlight readability, and Transmissive Mode (backlight ON) for use in low-light conditions. The specification provides a clear guideline: use reflective mode with backlight off when ambient illumination is above 1500 cd/m²; otherwise, use transmissive mode with backlight on.
The module is controlled by the ST7703I-G5-DP driver IC via a high-speed 4-lane MIPI DSI interface. It boasts a high resolution of 720x1440, providing sharp and detailed imagery. The "All Free" viewing direction suggests IPS or similar wide-viewing-angle technology. Its power consumption is remarkably low in reflective mode (0.146W), making it suitable for battery-powered devices used outdoors. The module also integrates a capacitive touch panel (CTP) with a G+F+F structure (Cover Glass + Film Sensor), supporting multi-touch input. The comprehensive I/O connection includes pins for the MIPI interface, display power (IOVCC, AVDD, AVEE), backlight (LEDA, LEDK), touch panel (TP-VDD, TP-SCL, TP-SDA, TP-INT, TP-RST), and control signals (RESET, TE).
Application Scenarios
This transflective module is perfect for devices facing challenging lighting conditions and requiring extended battery life:
- Outdoor Rugged Handhelds: Data terminals for logistics, field service, surveying, and military use.
- Sunlight-Readable Portable Devices: GPS units, marine chartplotters, and outdoor sports watches.
- Power-Efficient IoT Devices: Smart meters, environmental sensors, and agricultural monitors that need occasional reading.
- Industrial HMIs for Bright Environments: Control panels in factories, warehouses, or vehicles.
- Premium Portable Medical Devices: For use in both indoor and outdoor field settings.
Conclusion
The LESSON Smart Display LSC055I18-MP-V1 is an advanced and intelligent display solution that dynamically adapts to its environment. The combination of transflective technology, the ST7703I-G5-DP driver, MIPI interface, high resolution, and integrated touch makes it a top-tier choice for designing robust, readable, and energy-efficient portable devices intended for use anywhere from bright sunlight to darkness.
