LSC024I26-MP-V1: 2.4-Inch IPS TFT LCD Module, 240×320 Resolution, MIPI DSI Interface, 450 cd/m² Brightness, 1200:1 Contrast Ratio, Full Viewing Angle (IPS), Capacitive Touch Panel (CTP)
Product Subtitle / Keywords
2.4 Inch Display, 240(RGB) × 320 Resolution, a-Si TFT-LCD Module, Transmissive, COG+FPC+B/L+CTP Module Type, ST7785M Driver IC, MIPI DSI Interface (1-Lane), 450 cd/m² Luminance (Typ), 1200:1 Contrast Ratio (Typ), IPS (All O'Clock View Direction), 35ms Response Time (Typ), Operating Temperature -20°C to +70°C, Storage Temperature -30°C to +80°C, Supply Voltage IOVCC=1.8V (Typ), VCC=2.8V (Typ), Backlight Driving Condition IF=80mA, Vf=3.2V, RoHS Compliant, Product Spec Revision 1.0, Lesson Smart Display Technology Co., Ltd.
1. Executive Summary & Product Positioning
The LSC024I26-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 2.4 inch and the resolution is 240(RGB)*320, the panel can display up to 262k 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, mechanical specification (including module size, active area), outline dimension (including detailed mechanical drawing, interface specifications, and electrical parameters), absolute maximum ratings (for supply voltages and temperature), electrical characteristics (including recommended operating conditions for power supplies and logic levels), pin description (for the 25-pin main interface and 6-pin CTP interface), timing characteristics (for High Speed and Low Power MIPI DSI modes), electro-optical characteristics (including response time, contrast ratio, luminance, chromaticity, and viewing angles), and inspection standards (including AQL, glass, FPC, and dirt defect criteria).
The document provides the core parameters necessary for system integration into standard 2.4-inch portrait-oriented 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 262k colors.
- Display Resolution: QVGA: 240(RGB) × 320 pixel array.
- Display Mode: IPS (In-Plane Switching), providing wide viewing angles (all o'clock direction).
- Module Construction: COG+FPC+B/L+CTP (Chip-On-Glass + Flexible Printed Circuit + Backlight + Capacitive Touch Panel).
- Interface Type: The module uses a MIPI DSI (Display Serial Interface) interface. It includes a differential clock pair (CLKP/N) and a differential data pair (D0P/N), indicating a 1-lane MIPI DSI configuration.
- Power Architecture: Requires dual power supplies: VCC (2.8V Typ for the core/logic) and IOVCC (1.8V Typ for the I/O interface). The backlight is powered separately through dedicated LED+ and LED- pins.
- Backlight: White LED backlight with a driving condition specified as IF=80mA, Vf=3.2V. This suggests 4 LEDs in parallel.
- Touch Panel: The module includes a Capacitive Touch Panel (CTP) with a dedicated 6-pin interface (GND, RST, SDA, SCL, INT, VCC2.8V). The touch controller IC is FT6336U, supporting single-point touch and gestures.
- Driver IC: ST7785M.
- 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 | LSC024I26-MP-V1 | - |
| LCD Size (Diagonal) | 2.4 | inch |
| Resolution | 240(RGB) × 320 | pixels |
| Module size (H×V×D) | 49.6 × 67.9 × 4.08 | mm |
| Active area (H×V) | 36.72 × 48.96 | mm |
| Number of dots | 240(RGB) × 320 | pixel |
| Display Type | IPS (Transmissive) | - |
| Module Type | COG+FPC+B/L+CTP | - |
| Touch Panel | Capacitive (FT6336U, Single Point + Gesture) | - |
| 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 | 4.0 | V |
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.2 Recommended Operating Conditions (From Section 6)
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.4 | 2.8 | 3.3 | V |
| Supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input Voltage 'L' level | VIL | 0 | --- | 0.3*IOVCC | V |
| Input Voltage 'H' level | VIH | 0.7*IOVCC | --- | IOVCC | V |
3.2.3 Pin Description (25-Pin Main Interface, From Section 7-2)
The module uses a 25-pin FPC connector. Key signals include:
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | IOVCC | P | Power voltage |
| 3 | ID/GND | P | Ground |
| 4 | GND | P | Ground |
| 5 | LEDK | P | LED cathode |
| 6 | LEDA | P | LED anode |
| 7-14 | GND | P | Ground |
| 15 | D0N | I | Negative MIPI differential data inputs |
| 16 | D0P | I | Positive MIPI differential data inputs |
| 17 | CLKN | I | Negative MIPI differential clock inputs |
| 18 | CLKP | I | Positive MIPI differential clock inputs |
| 19 | GND | P | Ground |
| 20 | RST | I | Reset signal |
| 21 | TE | O | Tearing effect output pin to synchronize MPU to frame writing. If not used, open this pin. |
| 22 | GND | P | Ground |
| 23-24 | VCC | P | Power voltage |
| 25 | GND | P | Ground |
3.2.4 CTP Interface (6-Pin, From Section 7-2)
The capacitive touch panel has a dedicated 6-pin interface.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | RST | I | Reset Pin for TP |
| 3 | SDA | I | SDA pin for TP (I²C data) |
| 4 | SCL | I | SCL pin for TP (I²C clock) |
| 5 | INT | I | Interrupt signal for TP |
| 6 | VCC2.8V | P | Power voltage |
3.3 Timing Characteristics (From Section 7.4)
3.3.1 High Speed Mode (DSI) - Table
Conditions: VDDI=1.8, VDD=2.8, AGND=DGND=0V, Ta=25 °C
| Signal | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| DSI-CLK+/- | 2xUINSTA | Double UI instantaneous | 7.14 | 25 | ns |
| DSI-CLK+/- | UINSTA UINSTB | UI instantaneous halfs | 3.57 | 12.5 | ns |
| DSI-Dn+/- | tDS | Data to clock setup time | 0.15 | - | UI |
| DSI-Dn+/- | tDH | Data to clock hold time | 0.15 | - | UI |
3.4 Electro-Optical Characteristics (From Section 8)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Response time | Tr +Tf | θx = θy =0 | --- | 35 | 40 | ms |
| Contrast Ratio | CR | θx = θy =0 | 900 | 1200 | --- | - |
| Transmittance | T% | θx = θy =0 | 4.0 | 4.7 | --- | % |
| Color Chromaticity (White) CIE1931 | W x | θx = θy =0 | --- | 0.307 | --- | - |
| Color Chromaticity (White) CIE1931 | W y | θx = θy =0 | --- | 0.334 | --- | - |
| Viewing angle (Top) | θT | CR > 10 | 80 | 85 | --- | Deg. |
| Viewing angle (Bottom) | θB | CR > 10 | 80 | 85 | --- | Deg. |
| Viewing angle (Left) | θL | CR > 10 | 80 | 85 | --- | Deg. |
| Viewing angle (Right) | θR | CR > 10 | 80 | 85 | --- | Deg. |
| Luminance (I F = 80mA) | L | - | 400 | 450 | --- | cd/m² |
3.5 Backlight Driving Conditions
The backlight circuit from the outline drawing notes: IF=80mA, Vf=3.2V. This indicates 4 LEDs in parallel, requiring a constant current driver capable of delivering 80mA at approximately 3.2V. The total backlight power is 80mA × 3.2V = 256mW.
3.6 Inspection Standards (From Section 9)
The specification details the quality inspection criteria, based on GB/T 2828-2003; normal inspection, Class II. Key criteria include:
- Glass Defect Criteria: Specifies acceptable limits for cracks (reject), glass extrusion (minor defect: b ≤ 1/3 Pin width for non-bonding area, ≤ 0.5mm for bonding area), and damage to conductive/non-conductive areas.
- Black Tape & Mara Tape Defect: Tape shifts are minor defects, no black tape is a major defect, tape position mistakes are minor defects.
- Fiber/Glass Scratch, Polarizer Scratch: Scratches are allowed based on width and length (W≤0.03mm: disregard, 0.03mm
4. Application Guidelines & Critical Notes
Intended Use
- Standard 2.4-inch portrait-oriented display applications (e.g., smart home panels, industrial handhelds, IoT devices).
- Systems requiring a QVGA (240×320) resolution with an IPS display for wide viewing angles.
- Applications requiring a built-in capacitive touch panel (CTP) with gesture support.
- Systems utilizing a MIPI DSI interface for display communication.
Critical Design Considerations
- Dual Power Supply (VCC=2.8V, IOVCC=1.8V): 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 logic thresholds (VIL, VIH) are referenced to IOVCC. Ensure the host processor's MIPI DSI I/O voltage is compatible (typically 1.8V).
- MIPI DSI Interface (1-Lane): The module uses a 1-lane MIPI DSI interface. The differential clock (CLKP/N) and data (D0P/N) pairs must be routed with controlled impedance (typically 100Ω differential) and matched trace lengths. The data rate is specified by the UI (Unit Interval) parameters: 2xUI = 7.14ns (min) to 25ns (max), corresponding to a data rate range of approximately 40 Mbps to 140 Mbps per lane.
- External Backlight Driver (80mA @ 3.2V): The backlight consists of 4 LEDs in parallel, requiring a constant current driver capable of delivering 80mA at a forward voltage of 3.2V (Typ). The total backlight power is approximately 256mW.
- I²C Capacitive Touch Panel Interface: The CTP uses an I²C interface (SDA, SCL) with a dedicated reset pin (RST) and an interrupt output (INT). The touch controller IC is FT6336U. The host must initialize the touch controller by providing a reset pulse and then communicate over I²C to configure and read touch data. The CTP requires a separate 2.8V power supply (VCC2.8V).
- IPS Display (All O'Clock Viewing): The display uses IPS technology, providing excellent viewing angles in all directions (85° Typ in all four directions). This is ideal for applications where the display is viewed from various angles.
- Reset Sequence: The RST pin (Pin 20) is an active-low reset signal. The module must be properly reset after power-up and before any MIPI DSI commands are sent.
- TE (Tearing Effect) Pin: The TE pin (Pin 21) is an output from the driver IC that can be used to synchronize the host's frame writes to the display's internal frame memory. This prevents tearing artifacts. If not used, it should be left open.
- 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 49.6mm × 67.9mm × 4.08mm): The module is reasonably compact and thin (4.08mm) including the FPC and touch panel. The outline drawing specifies mechanical features and the viewing area. The general tolerance is ±0.20mm.
- ESD and Handling: The document specifies handling precautions. The module contains fragile glass and sensitive electronics.
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 LSC024I26-MP-V1 specification details a feature-rich, compact 2.4-inch QVGA (240×320) IPS TFT LCD module with an integrated capacitive touch panel, dual-power supply (2.8V/1.8V), and a MIPI DSI interface — an excellent choice for handheld and embedded applications requiring a modern, high-quality display interface with touch functionality.
Key Strengths
- IPS Display Technology with High Brightness (450 cd/m²) and High Contrast (1200:1): Superior wide viewing angles (85° in all directions), excellent readability in various lighting conditions, and vibrant colors.
- Modern MIPI DSI Interface: Reduces pin count and routing complexity compared to parallel RGB or MCU interfaces, suitable for modern application processors.
- Integrated Capacitive Touch Panel (CTP) with Gesture Support: Provides a complete touch display solution, reducing overall system integration complexity. The FT6336U controller supports basic gestures.
- Compact 2.4-inch Form Factor: Suitable for portable and space-constrained designs.
- Detailed Timing and Pinout Information: Comprehensive timing parameters for MIPI DSI operation and clear pin assignments facilitate straightforward system integration.
Main Design Focus
- The critical design tasks are providing dual power supplies (VCC=2.8V, IOVCC=1.8V) with proper decoupling, implementing a constant-current LED backlight driver (80mA at 3.2V), configuring the host processor's MIPI DSI interface with a 1-lane configuration at the correct data rate (UI between 3.57ns and 12.5ns), and initializing and communicating with the FT6336U touch controller over I²C (SDA, SCL) with a reset sequence and interrupt handling.
- Supporting requirements: Connect all ground pins. Ensure the RST pin can be driven low for a proper reset sequence. Integrate the TE pin for frame synchronization if needed (otherwise leave it open).
This module is an excellent choice for engineers designing modern embedded systems that require a high-quality touch display with a compact interface (MIPI DSI) and wide viewing angles (IPS).
