Product Subtitle / Keywords:
3.49 Inch Display, 640(RGB)×480 Resolution, Transmissive a-Si TFT-LCD, MIPI Interface, COG+FPC+B/L+LENS, 16.7M Colors, 30-Pin, FL7703N Driver, 76.84×63.84×3.07 mm, 6 White LEDs, Normally White, -20°C~70°C Operating Temperature

1. Executive Summary & Product Positioning

The LS035I08-MP-V1, developed by Lixin (Wan'an) Intelligent Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 3.49-inch transmissive amorphous Silicon TFT-LCD (a-Si TFT-LCD) module.

This product specification (Revision 1.0, Module Type: COG+FPC+B/L+LENS) serves as the definitive technical document, defining its structural composition (COG+FPC+B/L+LENS), physical features, mechanical dimensions, detailed electrical characteristics, complete MIPI interface pinout, and comprehensive electro-optical performance. It delivers a resolution of 640(RGB)×480 with 16.7M-color display capability, driven by the FL7703N controller.

The document provides the core parameters necessary for system integration into compact embedded display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications, interface timing, and mechanical tolerances described herein to ensure reliable performance and compatibility.

2. Detailed Product Overview & Architecture

• Core Technology: Transmissive-type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display).
• Display Mode: Active matrix TFT, Transmissive, Mode Positive, Normally White.
• Display Format: Graphic 640(RGB)×480 Dot-matrix.
• Display Characteristics: Capable of displaying up to 16.7 million colors.
• Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit) + LENS.
• Input Data: MIPI.
• Viewing Direction (Grayscale Inversion): Normally White.
• Drive IC: FL7703N.
• Connector Pin Count: 30-Pin.
• Approval Status: ☑ Approved Product Specification only (as per signature block).

3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

Critical Mechanical Design Notes (from outline dimension drawing):

1. Display Type: 3.49", TFT LCD.
2. Display Mode: Transmissive, Mode Positive.
3. Viewing Direction: Normally White.
4. Driver IC: FL7703N.
5. VCC: 2.8V, IOVCC: 2.8V/1.8V.
6. Operating Temperature: -20°C ~ 70°C.
7. Storage Temperature: -30°C ~ 80°C.
8. Backlight: 6 Chip-White LED, 6 Series 1 Connection, Vf=19.20±1.20V.
9. Key Dimension: Referenced Dimension: ().
10. Environmental Protection: RoHS.
11. General Tolerance: ±0.20 mm.
12. Angular Tolerance: ∠ ±1/4°.
13. FPC Total Thickness: PI补强+FPC总厚=0.30±0.03mm.
14. Backlight Thickness: BL 2.18±0.05mm.
15. Polarizer Thickness: POL 0.15mm.
16. Silver Paste Points: Present on the module (银浆点).
17. Yellow Insulation Paper: Included for handling during assembly (黄色绝缘胶纸).
18. Backlight Circuit: IF=20mA, Vf=16.8V-19.2V(TYP).

3.2 Electrical & Interface Specifications

3.2.1 Pin Description (30-pin FPC)

Interface Summary:

• MIPI Interface: Uses 4 data lanes (D0N/D0P, B1N/D1P, D2N/D2P, D3N/D3P) and 1 clock lane (CLK/N, CLKP) for high-speed serial data transmission.
• Backlight: Dedicated LEDA (Anode, Pins 3, 4) and LEDK (Cathode, Pins 1, 2) pins.
• Power: LCM VDD (Pin 29) for main logic (3.3V), GND (Pins 6, 9, 12, 15, 18, 21, 23, 30) for ground.
• Control: LCM RESET (Pin 26) for hardware reset, DSI,TE (Pin 25) for tearing effect.
• I2C Interface: LCM I2C SCL (Pin 27) and LCM I2C SDA (Pin 28) for register configuration.
• Unused Pins: Pins 5, 22, 24 are NC — leave floating.

3.2.2 Backlight Unit

Backlight Circuit Diagram (from document):

LEDA → [Backlight Circuit] → LEDK
IF = 20mA
VF = 19.2V (TYP)

3.3 Optical & Electro-Optical Characteristics

(Not explicitly provided in the extracted document excerpt; refer to Section 5 of the full specification.)

3.4 Version Record

(Not explicitly provided in the extracted document excerpt; refer to the REVISION HISTORY section of the full specification.)

4. Application Guidelines & Critical Notes

Intended Use

• Industrial control panels and human-machine interfaces (HMIs)
• Medical instruments and diagnostic equipment
• Point-of-sale (POS) terminals
• Any application requiring a standard VGA resolution display with MIPI interface

Critical Design Considerations

1. Interface (MIPI): This module uses a MIPI-DSI interface with 4 data lanes and 1 clock lane. The host MCU must have a MIPI-DSI controller that supports at least 4 data lanes.

2. Power Supply:

   • Provide stable LCM VDD (3.3V) for the main logic (connected to Pin 29).
   • The backlight requires a constant-current LED driver connected to LEDA (Anode, Pins 3, 4) and LEDK (Cathode, Pins 1, 2), set to 20 mA at approximately 16.8V-19.2V (Typ 19.2V).

3. Mechanical Integration:

   • Module Outline: 76.84mm (H) × 63.84mm (V) × 3.07mm (D).
   • Active Area: 70.08mm × 52.56mm.
   • FPC: The module uses a 30-pin FPC.
   • Module Construction: The module includes a LENS (COG+FPC+B/L+LENS), providing additional protection for the display panel.

4. Optical Performance:

   • Resolution: 640×480 (VGA) – standard resolution for industrial and embedded applications.
   • Display Colors: Up to 16.7M colors (24-bit true color).
   • Display Mode: Normally White – the display appears white when no voltage is applied.

5. Temperature Limits:

   • Operating Temperature: -20°C to +70°C.
   • Storage Temperature: -30°C to +80°C.

Handling & Compliance

• The module is RoHS compliant.
• Observe standard ESD precautions during handling and assembly.
• The module contains fragile glass and a 30-pin FPC – handle with care.
• Avoid bending the FPC sharply, especially near the connector interface.
• The module has a total thickness of 3.07mm – be careful when handling to avoid flexing.
• The module includes a yellow insulation paper for handling during assembly.

5. Conclusion & Design-In Support

The LS035I08-MP-V1 specification details a standard 3.49-inch VGA display module with a MIPI interface and FL7703N driver — an excellent choice for applications requiring a standard VGA resolution display with a high-speed MIPI interface.

Key Strengths:

1. Standard VGA Resolution (640x480): Widely supported by many MCUs and graphics libraries, simplifying software development.

2. MIPI Interface with 4 Data Lanes: Provides high bandwidth for smooth video and animation playback.

3. High Color Depth: 16.7M colors (24-bit true color) provides excellent color reproduction.

4. Integrated LENS: The module includes a LENS for additional display protection.

5. I2C Interface: The module includes an I2C interface (SCL/SDA) for register configuration.

6. Wide Operating Temperature Range: -20°C to +70°C for operation and -30°C to +80°C for storage.

Main Design Focus:

• The critical design task is properly implementing the MIPI-DSI interface with 4 data lanes to ensure reliable high-speed data transfer.
• Supporting requirements:
  • Provide stable LCM VDD (3.3V) power.
  • Provide a constant-current backlight driver set to 20 mA at 19.2V (Typ).
  • Mechanical integration — the module outline is 76.84mm × 63.84mm × 3.07mm.
  • FPC connector — verify the 30-pin FPC.

This module is an excellent choice for industrial control panels, medical instruments, and any embedded application requiring a standard VGA resolution display with a high-speed MIPI interface and integrated LENS protection.