LSC0395I10-MP-V1: 3.95-Inch TFT LCD Module, 720×720 Resolution, MIPI Interface, IPS Display
Product Subtitle / Keywords
3.95 Inch Display, 720(RGB)×720 Resolution, a-Si TFT-LCD Module, Transmissive, IPS Display, 16.7M Display Colors, COG+FPC+B/L+CTP Module Type, MIPI-DSI 4-Lane Interface, Operating Temperature -20°C to +60°C, Storage Temperature -30°C to +70°C, Supply Voltage VCI=2.8V to 3.3V (Recommended), IOVCC=1.8V (Typ), Driver IC ST7703, Viewing Direction ALL O’CLOCK (IPS), Backlight IF=40mA, Module Type COG+FPC+B/L+CTP, RoHS Compliant, Spec Rev 1.0, Lesson Smart Display Technology Co., Ltd.
1. Executive Summary & Product Positioning
The LSC0395I10-MP-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit. The panel size is 3.95 inch and the resolution is 720(RGB)*720, the panel can display up to 16.7M colors. The module type is COG+FPC+B/L+CTP.
This product specification (Revision 1.0) serves as the definitive technical document, defining the module's general description, physical features (including display mode, viewing angle, and luminance), outline dimension (including detailed mechanical drawings and notes on CTP, backlight, operating/storage temperature, and driver IC), absolute maximum ratings (for supply voltage, operating temperature, and storage temperature), and module function description (including pin description and MIPI DSI and Reset timing characteristics).
The document provides the core parameters necessary for system integration into standard 3.95-inch high-resolution square display applications. The unequivocal recommendation for engineers is to strictly adhere to the mechanical and electrical specifications 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) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit.
- Display Resolution: High-density square format: 720(RGB) × 720 pixel array.
- Display Mode: IPS (In-Plane Switching) with \"ALL O’CLOCK\" viewing direction (Grayscale Inversion). Active matrix TFT, Normally Black, Transmissive type.
- Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight) + CTP (Capacitive Touch Panel).
- Interface Type: The module uses a high-speed 4-Lane MIPI DSI (Display Serial Interface) for both pixel data and command/register configuration. The interface supports both High-Speed (HS) and Low-Power (LP) modes.
- Power Architecture: The module's driver IC supports the following power supply ranges: VCI=2.8V to 3.3V and IOVCC=1.65V to 3.3V.
- Backlight: A white LED backlight consisting of 14 chips in parallel. The driving condition is specified as IF=40mA (constant current) and a typical forward voltage Vf=21V.
- Touch Panel: The module includes a Capacitive Touch Panel (CTP) interface, which uses a GT911 touch controller with a sensing structure of P+FF. It supports 5-point multi-touch. The communication with the touch panel uses pins like CTP_VDD, CTP_SDA, CTP_SCL, CTP_INT, and CTP_RST, operating at 1.8V for the I²C communication.
- Driver IC: ST7703
- Supplier: 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item | Specification | Unit |
|---|---|---|
| Model | LSC0395I10-MP-V1 | - |
| Display Size (Diagonal) | 3.95 | inch |
| Resolution | 720(RGB) × 720 | pixels |
| Display Type / Mode | Transmissive a-Si TFT-LCD, Active matrix TFT, Normally Black, IPS | - |
| Module Type | COG+FPC+B/L+CTP | - |
| Display Colors | 16.7M | colors |
| Viewing Direction | ALL O'CLOCK (IPS) | - |
| Module Luminance (with CTP) | 330 cd/m² (Typ.) | - |
| CTP Structure | P+FF (ITO FILM: 0.35mm, Cover LENS: Acrylic 2.4mm) | - |
| CTP Controller | GT911, 5-point multi-touch | - |
| Driver IC | STCM (Specification) | - |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd) | - |
3.2 Interface & Electrical Specifications
3.2.1 Absolute Maximum Ratings (From Section 5)
| Item | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 6.6 | V |
| Supply voltage | IOVCC | -0.3 | 5.5 | V |
| Operating temperature | TOPR | -20 | 60 | °C |
| Storage temperature | TSTR | -30 | 70 | °C |
3.2.2 Pin Description (Partial, From Section 7-2)
The module uses a FPC connector which integrates the LCM, backlight, and CTP interface signals.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 15 | GND | P | Ground |
| 16, 17 | D0P, D0N | I/O | MIPI-DSI Data Lane 0 differential signal input/output pins. |
| 18 | GND | P | Ground |
| 19, 20 | D1P, D1N | I | MIPI-DSI Data Lane 1 differential signal input pins. |
| 21, 22 | D2P, D2N | I | MIPI-DSI Data Lane 2 differential signal input pins. |
| 23, 24 | D3P, D3N | I | MIPI-DSI Data Lane 3 differential signal input pins. |
| 25 | GND | P | Ground |
3.2.3 Electrical Characteristics (From Section 7-2)
The module uses a constant current LED driver. The key backlight specifications are:
- Backlight Type: White LED, 14 chips in parallel.
- Forward Voltage (Vf): 21V (Typ).
- Forward Current (If): 40 mA (Typ).
- CTP Operating Voltage: 2.8V - 3.3V.
- CTP I²C Communication Voltage: 1.8V.
3.3 Timing Characteristics
3.3.1 MIPI DSI High Speed Mode Timing (From Section 7-2)
Key parameters for the MIPI DSI interface:
| Signal | Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|---|
| DSI_CP/DSI_CN | Double UI instantaneous | 2xUINST | TBD | 25 | ns |
| DP/DN | Data to clock setup time | TDS | 0.15xUI | - | ps |
| DSI_CP/DSI_CN | Differential rise time for clock | TDRTCLK | 150 | 0.3UI | ps |
| DP/DN | Differential rise time for data | TDRTDATA | 150 | 0.3UI | ps |
3.3.2 MIPI DSI Low Power Mode Timing (From Section 7-2)
| Signal | Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|---|
| DSI_D0P/DSI_D0P | Length of LP-00/LP01/LP10/LP11 Host → Display module | TLPXM | 50 | - | ns |
| DSI_D0P/DSI_D0P | Time-out before the MPU start driver | TTA-SURE | TLPXD | 2xTLPXD | ns |
| DSI_D0P/DSI_D0P | Time to drive LP-00 by display module | TTA-GET | 5xTLPXD | - | ns |
3.3.3 Reset Input Timing (From Section 7.3.3)
| Symbol | Parameter | Min. | Unit |
|---|---|---|---|
| tRESW | Reset low pulse width | 10 | μs |
| tREST | Reset complete time (when reset applied during SLPIN mode) | 15 | ms |
| tREST | Reset complete time (when reset applied during SLPOUT mode) | 120 | ms |
4. Application Guidelines & Critical Notes
Intended Use
- High-resolution 3.95-inch square display applications (e.g., smart home control panels, automotive instrument clusters, portable gaming devices, industrial HMIs).
- Systems requiring a 720x720 high pixel density display with a high-speed MIPI DSI 4-Lane interface.
- Applications requiring a built-in capacitive touch panel (CTP) with an I²C interface.
Critical Design Considerations
- High Voltage Backlight (Vf=21V @ 40mA): The backlight is composed of 14 LED chips in parallel, requiring a constant current driver capable of delivering 40mA at a forward voltage of 21V (Typ). This is higher than a typical 3.95-inch display and requires a suitable boost converter.
- 4-Lane MIPI DSI Interface: The module uses a 4-lane MIPI DSI interface for its high data rate requirements. The host processor must support this configuration. The pin list shows dedicated D0P/N, D1P/N, D2P/N, D3P/N pins. The specification provides extensive timing parameters for both High-Speed (HS) and Low-Power (LP) modes.
- High Resolution (720x720): The display's high pixel density (720x720) demands significant data bandwidth and may require careful PCB layout for the MIPI signals and power supplies.
- Dual Voltage CTP Interface: The touch panel controller (GT911) requires a VDD of 2.8V-3.3V for its core, while the I²C communication interface operates at 1.8V.
- IPS Display with Wide Viewing Angle: The display uses IPS technology, providing "ALL O’CLOCK" viewing direction with no grayscale inversion.
- Temperature Range (-20°C to +60°C Operating): A standard consumer/industrial temperature range, though the storage range extends down to -30°C.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass – handle with care. Avoid mechanical stress on the active area or FPC.
- Do not attempt to disassemble or modify the LCD module.
- The module is RoHS compliant.
5. Conclusion & Design-In Support
The LSC0395I10-MP-V1 specification details a high-resolution 3.95-inch square (720×720) IPS TFT LCD module with a transmissive display, a high-speed 4-Lane MIPI DSI interface, and an integrated capacitive touch panel — an advanced and powerful choice for embedded applications requiring a crisp, detailed square display solution.
Key Strengths
- High Resolution Square Format: The 720x720 resolution provides exceptional pixel density for sharp text and detailed graphics in a square form factor.
- High-Performance MIPI Interface: The 4-lane MIPI DSI interface ensures sufficient bandwidth for high frame rate and high resolution video.
- Integrated Capacitive Touch Panel (I²C): Provides a complete touch display solution without needing an external touch controller.
- Full-Viewing-Angle IPS Display: The ALL O'CLOCK viewing angle ensures consistent image quality from any perspective.
- Detailed Technical Documentation: Comprehensive specs facilitate rapid integration.
Main Design Focus
- The critical design tasks are implementing a boost constant-current LED backlight driver (40mA at ~21V), interfacing the host processor's 4-lane MIPI DSI controller with correct differential signal routing and impedance matching, providing stable power supplies for the display (VCI, IOVCC) and touch panel (CTP_VDD), and initializing and communicating with the touch controller over I²C (TP_SDA, TP_SCL, TP_INT, TP_RESET).
- Supporting requirements: Connect all ground pins. Ensure the RESET pin is driven low for a proper initialization sequence (minimum 10µs pulse).
This module is an excellent choice for engineers designing demanding embedded systems that require a high-resolution square-format IPS display with touch and a high-speed MIPI interface for video data.
