LSC028I05-MP-V1: 2.76-Inch IPS TFT LCD Module, 480×480 Resolution, MIPI Interface, Capacitive Touch Panel
Product Subtitle / Keywords
2.76 Inch Display, 480(RGB)×480 Resolution, a-Si TFT-LCD Module, Transmissive, COG+FPC+B/L Module Type, 16.7M Display Colors, IPS Display Mode, MIPI Interface, Operating Temperature -20°C to +70°C, Storage Temperature -30°C to +80°C, Supply Voltage VCC=2.8V (Typ), IOVCC=1.8V (Typ), RoHS Compliant, Product Spec Revision 1.0, Lesson Smart Display Technology Co., Ltd.
1. Executive Summary & Product Positioning
The LSC028I05-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 2.76 inch and the resolution is 480(RGB)*480, the panel can display up to 16.7M colors.
This product specification (Revision 1.0) serves as the definitive technical document, defining the module's general description, physical features, mechanical specification (including module size, number of dots, and active area), outline dimension (including detailed mechanical drawings, notes on general tolerance, operating/storage temperature, and RoHS compliance), absolute maximum ratings (for supply voltage, operating temperature, and storage temperature), electrical characteristics (including recommended operating conditions for power supplies and logic levels), pin description (for the MIPI and touch panel interface), timing characteristics (including high speed mode MIPI timing and reset timing), and electro-optical characteristics (including response time, contrast ratio, luminance, chromaticity, and viewing angles).
The document provides the core parameters necessary for system integration into standard 2.76-inch square-format 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. The panel can display up to 16.7M colors.
- Display Resolution: Square format: 480(RGB) × 480 pixel array.
- Display Mode: The document indicates this is an IPS display based on the general description and physical features typically associated with IPS technology (wide viewing angles).
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight). Note: The document does not explicitly state a CTP (Capacitive Touch Panel) in the module type, but the pin description includes touch panel signals (TP_SDA, TP_SCL, TP_RST, TP_VCC).
- Interface Type: The module uses a MIPI (Mobile Industry Processor Interface) DSI (Display Serial Interface) for high-speed data transmission. The interface includes a clock lane (DSI-CLK+/-) and at least one data lane (DSI-D0+/-).
- Power Architecture: Requires dual power supplies: VCC (2.8V Typ for the core/logic) and IOVCC (1.8V Typ for the I/O interface).
- Backlight: White LED backlight. The specific driving conditions (current, voltage) are not detailed in the provided excerpt but are referenced in the general description.
- Touch Panel: The module includes a capacitive touch panel (CTP) interface as indicated by the pin description (TP_SDA, TP_SCL, TP_RST, TP_VCC). The specific touch controller IC is not mentioned in the provided context.
- Driver IC: ST7701SN
- 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 | LSC028I05-MP-V1 | - |
| LCD Size (Diagonal) | 2.76 | inch |
| Resolution | 480(RGB) × 480 | pixels |
| Module size (H×V×D) | 73.03 × 76.58 × 2.26 | mm |
| Active area (H×V) | 70.13 × 70.13 | mm |
| Number of dots | 480(RGB) × 480 | pixel |
| Display Type | Transmissive a-Si TFT-LCD | - |
| Module Type | COG+FPC+B/L | - |
| Display Colors | 16.7M | colors |
| 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 | 4.6 | V |
| Supply voltage | IOVCC | -0.3 | 4.6 | V |
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.2 Recommended Operating Conditions (From Section 6 - Inferred from Typical MIPI Configurations)
The document specifies the test conditions as VDD1=1.8V, VDD=2.8V, AGND=DGND=0V, Ta=25°C. This implies two main power rails:
- VDD (Core/Logic Power): 2.8V (Typ).
- VDD1 or IOVCC (I/O Interface Power): 1.8V (Typ).
Note: The absolute maximum rating is 4.6V for both VCC and IOVCC.
3.2.3 Pin Description (From Section 7-2 - Partial)
The module uses a MIPI interface. Key signals from the provided excerpt include:
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 26 | TP_SDA | I | Serial data input/output bidirection pin (Touch Panel I²C Data) |
| 27 | TP_SCL | I | Serial clock pin (Touch Panel I²C Clock) |
| 28 | TP_RST | I | Reset signal pin (Touch Panel Reset) |
| 29, 30 | TP_VCC | P | Power supply (Touch Panel Power) |
Note: The full pin description for the MIPI interface (e.g., DSI-CLK+/-, DSI-D0+/-, RESX) is referenced in the timing characteristics but not fully listed in the provided text excerpt.
3.3 Timing Characteristics (From Section 7-3 and 7-4)
3.3.1 High Speed Mode MIPI Timing (From Section 7.5.4.1)
The MIPI DSI interface supports high-speed data transmission. Key timing parameters (measured at VDDI=1.8V, VDD=2.8V, Ta=25°C) include:
| Signal | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|
| DSI-CLK+/- | Double UI instantaneous | 2.5 | 25 | ns |
| DSI-Dn+/- | Data to clock setup time (tDS) | 0.15 | - | UI |
| DSI-Dn+/- | Data to clock hold time (tDH) | 0.15 | - | UI |
3.3.2 Reset Timing (From Section 7-4)
The reset timing (RESX pin) is specified at VDDI=1.8V, VDD=2.8V, AGND=DGND=0V, Ta=25°C.
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us |
| RESX | TRT | Reset cancel time | - | 5 (Note 1, 5) | ms |
| RESX | TRT | Reset cancel time (Alternative Note) | - | 120 (Note 1, 6, 7) | ms |
4. Application Guidelines & Critical Notes
Intended Use
- Standard 2.76-inch square-format display applications (e.g., smart home panels, industrial HMI, IoT devices, wearable/portable devices).
- Systems requiring a square 480×480 resolution with a high-quality IPS-type display for wide viewing angles and vibrant colors.
- Applications requiring a MIPI DSI interface for high-speed data transfer and high-resolution video playback.
- Systems requiring a built-in capacitive touch panel (CTP) with an I²C interface.
Critical Design Considerations
- Dual Power Supply (VCC=2.8V for Core, IOVCC=1.8V for I/O): The module requires a stable 2.8V supply for the core/analog circuitry and a separate 1.8V supply for the I/O interface. The MIPI DSI logic levels are likely compatible with 1.8V. Ensure the host processor's MIPI DSI I/O voltage is compatible (typically 1.8V).
- MIPI DSI Interface (1-Lane): The module uses a MIPI DSI interface with a clock lane (DSI-CLK+/-) and one data lane (DSI-D0+/-). The host must be configured to operate in DSI mode at the appropriate data rate (the UI instantaneous ranges from 2.5ns to 25ns, corresponding to a data rate of 40 Mbps to 400 Mbps per lane).
- External Backlight Driver: The backlight driving conditions are not explicitly provided in the excerpt. The designer must consult the full specification for forward voltage (Vf) and drive current (If) requirements and implement a suitable constant-current driver.
- I²C Capacitive Touch Panel Interface: The CTP uses an I²C interface (TP_SCL, TP_SDA) with a dedicated reset pin (TP_RST) and is powered by TP_VCC. The host must initialize the touch controller by providing a reset pulse and then communicate over I²C to configure and read touch data.
- IPS Display with Wide Viewing Angle: The module uses IPS technology, providing superior viewing angles compared to TN displays. This is a key advantage for applications where the display will be viewed from various angles.
- Reset Sequence (TRW minimum 10us, TRT up to 120ms): The RESX pin (active-low) must be held low for a minimum of 10 microseconds to initiate a reset. After releasing RESX, the module's internal initialization may take up to 5ms (or 120ms depending on the specific configuration, as per the notes). The host must allow sufficient time after the reset pulse before attempting any MIPI communication.
- Temperature Range (-20°C to +70°C Operating): A standard consumer/industrial temperature range. It is suitable for most indoor and outdoor applications.
- Mechanical Integration (Module Outline 73.03mm × 76.58mm × 2.26mm): The module is very thin (2.26mm). The mechanical drawing specifies precise locations for the active area and FPC. The document notes a tolerance of ±0.2mm for segments to edge of glass.
- ESD and Handling: Standard ESD precautions must be observed during handling and assembly due to the sensitive electronic and glass components.
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 LSC028I05-MP-V1 specification details a compact, high-resolution 2.76-inch square (480×480) IPS TFT LCD module with a MIPI DSI interface and an integrated capacitive touch panel — an excellent choice for embedded applications requiring a modern, high-performance display solution with a square format.
Key Strengths
- High-Resolution Square Format (480×480): Ideal for smart home interfaces, round/circular clock displays, and other applications where a square aspect ratio is desired.
- Modern MIPI DSI Interface: Enables high-speed data transfer with relatively few pins, suitable for video playback and high frame rate graphics.
- High-Quality IPS Display: Provides wide viewing angles, high contrast, and vibrant colors (16.7M).
- Integrated Capacitive Touch Panel (I²C): Provides a complete touch display solution.
- Ultra-Thin Design (2.26mm): Enables space-constrained product designs.
Main Design Focus
- The critical design tasks are properly configuring the host processor's MIPI DSI controller to match the module's timing parameters (UI instantaneous: 2.5ns to 25ns, tDS/dH: 0.15 UI), providing dual power supplies (VCC=2.8V, IOVCC=1.8V) with proper decoupling, implementing a constant-current LED backlight driver (details from full spec required), and initializing and communicating with the touch controller over I²C.
- Supporting requirements: Connect all ground pins. Ensure the RESX pin is driven low for at least 10us for a proper reset sequence. Allow up to 120ms after reset for module initialization.
This module is a modern and powerful choice for engineers designing embedded systems that require a high-resolution square display with a high-speed MIPI interface and touch functionality.
