LSL0395I13R-MP-V2: 3.95-Inch Square IPS TFT LCD Module, 720x720 Resolution, 16.7M Colors, 500 nits, MIPI DSI Interface, FL7703NI Driver, for Industrial and Consumer Applications

Product Subtitle / Keywords:
3.95 Inch IPS Display, Square 720x720 Resolution, Transmissive a-Si TFT, MIPI DSI Interface, FL7703NI Driver IC, COG+FPC+B/L, 500 cd/m² Luminance, -20°C to +70°C Operation, Comprehensive Reliability & Safety Guidelines

Comprehensive Technical Specification & Application Guide

1. Executive Summary & Product Positioning

The LSL0395I13R-MP-V2, developed by LESSON (Wan‘an) Zhixian Technology Co., Ltd., is a high-resolution 3.95-inch square transmissive amorphous Silicon TFT-LCD module. This product specification serves as the definitive technical and quality contract, meticulously defining its structural composition (TFT-LCD panel, driver circuit, and backlight unit), mechanical dimensions, display parameters, detailed MIPI DSI interface definition, electrical and optical performance. It delivers a square resolution of 720(RGB)×720 with 16.7 million color capability, featuring an IPS panel for wide viewing angles and a typical surface luminance of 500 cd/m². The module is designed for robust performance with an operating temperature range of -20°C to +70°C and complies with RoHS standards. The unequivocal recommendation for users is to strictly follow the provided electrical characteristics, mechanical specifications, and environmental limits during design and integration to ensure module compatibility, reliability, and achievement of the specified performance throughout the product lifecycle.

2. Detailed Product Overview & Architecture

• Core Technology: Transmissive-type a-Si TFT-LCD with an IPS (In-Plane Switching) panel.
• Display Characteristics: Capable of displaying up to 16.7 million colors.
• Module Construction: Composed of a TFT-LCD panel, a driver circuit (IC: FL7703NI), and a backlight unit.
• Interface: MIPI DSI (Display Serial Interface) high-speed differential interface.

3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

• Panel Size (Diagonal): 3.95 inches
• Resolution: 720 (RGB) × 720 dots
• Display Mode: Transmissive, IPS
• Module Structure: LCD panel + FPC + Backlight

3.2 Optical & Electro-Optical Characteristics

• Surface Luminance: 400 cd/m² (Minimum), 500 cd/m² (Typical)
• Viewing Direction: All directions (inherent to IPS)
• Backlight: Configuration: 6 strings, 2 parallels.

3.3 Electrical & Interface Specifications

3.3.1 Absolute Maximum Ratings

• Operating Temperature (Top): -20°C to +70°C
• Storage Temperature (Tstg): -30°C to +80°C
• Note: The specification also lists a conditional rating: VSS=0V, IOVCC=1.65V to 3.3V, VCI=2.3V to 3.3V, TA = -30 to 70°C.

3.3.2 Pin Description (MIPI DSI Interface)

The module uses an FPC connector. Key pins from the provided table include:

3.3.3 Critical Interface Timing (Low-Power Mode)

Key timing parameters for the MIPI DSI interface's Low-Power mode data lane turnaround are provided:

Note: TTA-SURE Max = 2 x TLPXD.

3.4 Driver & Backlight

• Main LCD Driver IC: FL7703NI
• Backlight Driver Circuit: Requires constant current drive. Typical driving condition: IF=40mA, Vf=18V (Typical).

4. Mechanical Integration & Critical Notes

• FPC Bending: A specific bending diagram is provided for the Flexible Printed Circuit. The design must adhere to the recommended bend radius and area to prevent damage.
• Mounting & Housing:
  • The shell's visible area should be at least 0.3mm smaller per side than the module's active area (VA).
  • The foam gasket window on the housing should be at least 0.6mm larger per side than the VA.
  • The TP (Touch Panel, if applicable) edge must not contact metal conductors.
• Shielding: The module utilizes double-sided EMI shielding film and conductive cloth for electromagnetic compatibility.
• Reinforcement: A steel sheet (T=0.2mm) is used for reinforcement in specific areas.

5. Application Guidelines & Critical Design Considerations

• Intended Use: Industrial HMIs, portable devices, consumer electronics, medical instruments—any application requiring a high-brightness, square, high-resolution color display with a modern MIPI interface.
• Critical Design Considerations:
  1. Interface Timing: The host processor must comply with the MIPI DSI protocol and the specified Low-Power mode timing parameters (TLPXM, TLPXD, TTA-SURE, etc.) for reliable communication.
  2. Power Supply Decoupling: Follow the pin description to place the recommended decoupling capacitors (1uF for VGH/VGL, 2.2uF for VCOM) close to the module's FPC connector.
  3. Backlight Driver: Design a constant-current driver circuit suitable for a 6S2P LED configuration. Do not exceed the recommended current (40mA typical total).
  4. Mechanical Integration: Strictly follow the housing design rules regarding clearance for the active area and foam gasket to avoid mechanical stress or light leakage.
  5. ESD & Handling: Implement standard ESD protection during handling and assembly. The module includes design features like shielding, but system-level protection is still required.

6. Conclusion & Design-In Support

The LSL0395I13R-MP-V2 specification provides the essential parameters for integrating a high-quality 3.95-inch square IPS display into your product. Successful implementation hinges on careful attention to the MIPI DSI interface timing, proper backlight driver design, and precise mechanical integration as outlined in the mechanical notes. By adhering to the electrical characteristics, absolute maximum ratings, and the detailed mechanical guidelines, designers can ensure this module delivers its full potential of high brightness and sharp 720x720 resolution in a robust and reliable manner.