Product Main Title:
LS0397I09-MP-V1: 3.97-Inch TFT LCD Module, 480x800 Resolution, 16.7M Colors, MIPI DSI Interface, for Mobile and Embedded Applications
Product Subtitle / Keywords:
3.97 Inch Display, WVGA 480x800 Resolution, Transmissive a-Si TFT, MIPI DSI Interface, COG+FPC+B/L, 16.7M Colors, -20°C to +70°C Operation, Detailed Electrical Specs & Inspection Standards per GB/T 2828-2003
Comprehensive Technical Specification & Application Guide
1. Executive Summary & Product Positioning
The LS0397I09-MP-V1, developed by LESSON (Wan'an) Zhixian Technology Co., Ltd., is a 3.97-inch transmissive amorphous Silicon TFT-LCD module. This product specification book serves as the definitive technical and quality contract, meticulously defining its structural composition (COG+FPC+B/L), physical and mechanical dimensions, electrical parameters, photoelectric performance, and inspection standards and defect judgment criteria according to GB/T 2828-2003. It delivers a WVGA resolution of 480(RGB)×800 with 16.7 million color capability. The result is a complete presentation of the module's design and quality requirements, providing a technical basis for production, inspection, and application. The unequivocal recommendation for manufacturers and users is to strictly follow this specification for design verification, quality control, and compatibility assessment to ensure product performance and reliability.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive-type a-Si TFT-LCD.
- 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). Composed of a TFT-LCD panel, a driver circuit, 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): 3.97 inches
- Resolution: 480 (RGB) × 800 pixels
- Display Mode: Transmissive a-Si TFT-LCD
3.2 Electrical & Interface Specifications
3.2.1 Electrical Characteristics (DC)
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply Voltage (Main) | VCC | 2.5 | 2.8 | 3.6 | V | Note1 |
| Supply Voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage (L) | VIL | VSS | -- | 0.3*IOVCC | V | Note1 |
| Input Voltage (H) | VIH | 0.7*IOVCC | -- | IOVCC | V | Note1 |
| LCD Drive Power Current | ILCD | -- | TBD | -- | mA |
3.2.2 Pin Description (24-pin FPC, MIPI DSI)
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1, 2 | D1N, D1P | I | MIPI DSI differential data pair |
| 3, 4, 7, 8, 11, 15, 16, 24 | GND | P | Ground |
| 5, 6 | D0N, D0P | I/O | MIPI DSI differential data pair |
| 9, 10 | CLKN, CLKP | I | MIPI DSI differential clock pair |
| 12 | TP_RST | I | TP Reset signal pin |
| 13 | NC | Not Connected | |
| 14 | RESET | I | The external reset input |
| 17 | IOVCC | P | I/O power supply (1.8V Typ) |
| 18 | VCI | P | power supply |
| 19 | CTP_SCL | I | TP Serial clock pin |
| 20 | CTP_SDA | I/O | TP Serial data input/output bidirection pin |
| 21 | CTP_INT | I | TP Interrupt signal |
| 22 | LEDK | P | Power for LED backlight cathode |
| 23 | LEDA | P | Power for LED backlight anode |
Note: The presence of Touch Panel (TP) pins (TP_RST, CTP_SCL, CTP_SDA, CTP_INT) suggests this module may be designed for use with an external capacitive touch panel, though the "Module Type" is listed as COG+FPC+B/L (not +CTP). Confirm with the supplier if a touch panel is included or if these are optional connections.
3.2.3 Reset Timing
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us |
| RESX | TRT | Reset cancel | - | 5 (Note 1, 5) | ms |
| RESX | TRT | Reset cancel | - | 120 (Note 1, 6, 7) | ms |
4. Quality Assurance & Inspection
4.1 Inspection Standards
- Basis: According to GB/T 2828-2003.
- Defect Classification: Major and Minor defects with corresponding Acceptable Quality Limits (AQL).
4.2 Defect Criteria (Examples - Tape & Assembly)
- FPC or H/S black tape shift (minor defect): Shift exposing glue to the polarizer (Reject); exceeding FPC/H-S edge or exposing IC (Reject).
- No black tape (Major defect): Reject.
- Tape position mistake (minor defect): Not per engineering drawing (Reject).
- Mara tape defect (minor defect): Peeling before pulling the protecting film (Reject).
5. Application Guidelines & Critical Notes
- Intended Use: Mobile devices, portable industrial equipment, consumer electronics—applications requiring a medium-sized color display with a modern MIPI interface.
- Critical Design Considerations:
- Dual Power Domains: Provide stable 2.8V (VCC) and 1.8V (IOVCC) supplies. Ensure IOVCC logic level compatibility with the host's MIPI D-PHY.
- MIPI DSI Host: The host processor must include a MIPI DSI transmitter compatible with the module's configuration (data lanes D0, D1).
- Reset Sequencing: Implement proper reset control (RESET). Adhere to the specified pulse width (≥10us) and cancel timing.
- External Touch Panel: If utilizing touch functionality, connect an appropriate capacitive touch panel to the provided I²C and control pins (CTP_*, TP_RST).
- Backlight Driver: Design an external constant-current driver for the LED backlight (LEDA, LEDK).
- Quality Inspection: For procurement, reference the provided GB/T 2828-2003 based defect criteria for incoming quality checks.
- Handling: Observe standard ESD precautions.
6. Conclusion & Design-In Support
The LS0397I09-MP-V1 specification provides the essential parameters for integrating a 3.97-inch WVGA display with a MIPI DSI interface. Its key strengths are the modern high-speed interface and the inclusion of formal quality inspection standards, which aid in manufacturing and procurement quality control. Successful implementation requires a host with MIPI DSI capability and careful attention to dual-voltage power supply design. Designers should clarify with the supplier regarding the integration status of the touch panel referenced by the pinout. By following this specification, particularly the electrical limits and reset timing, designers can integrate a reliable display for their embedded applications.
