LS024I46-S-V1 2.4 inch TFT-LCD Module 240x320 262K Colors
1. Executive Summary & Product Positioning
The LS024I46-S-V1 is a 2.4-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module developed by 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). The panel size is 2.4 inch and the resolution is 240(RGB)*320, the panel can display up to 262k colors. This module is a COG (Chip-on-Glass) + FPC + B/L (Backlight) construction. The product specification was first released on 2026-07-06.
Product Positioning: This 2.4-inch module is well-suited for a wide range of applications requiring a compact, high-quality display with a wide viewing angle and a simple 4-wire SPI interface. It is ideal for handheld devices, portable instruments, smart home controllers, and other embedded display systems.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 2.4-inch diagonal, a-Si TFT active matrix, transmissive, IPS (In-Plane Switching). Resolution is 240(RGB) × 320 pixels.
- Driver Circuit: The module communicates via a 4-SPI (4-Wire Serial Peripheral Interface).
- Backlight Unit (B/L): A white LED backlight with 4 Chip-White LEDs configured in parallel. The typical driving condition is IF=80mA, Vf=2.8~3.2V.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The LCM module dimensions are 42.72 × 58.5 × 2.20 mm (H×V×D).
- Interface: The module communicates via an 18-pin FPC connector. The display interface is 4-Wire SPI (Serial Peripheral Interface).
- Display Mode: Transmissive, IPS.
- Viewing Direction: Full viewing angle (IPS).
- RoHS: All materials are compliant with RoHS standards.
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 2.4 inches |
| Resolution (Dots) | 240(RGB) × 320 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, IPS |
| Module Construction | COG+FPC+B/L |
| Color Depth | 262K Colors |
| Input Data Interface | 4-Wire SPI |
| Module Size (H×V×D) | 42.72 × 58.5 × 2.20 mm |
| Active Area (H×V) | 36.72 × 48.96 mm |
| Display Mode | Transmissive, IPS |
| Backlight Type | 4 Chip-White LEDs, Parallel |
| Operating Temperature | -10°C to +70°C |
| Storage Temperature | -20°C to +80°C |
| Environmental Compliance | RoHS |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage to the device.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage | IOVCC | -0.3 | 4.0 | V | Note1 Note2 |
| Operating temperature | TOPR | -10 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -20 | 80 | °C | Note1 Note2 |
3.3 Electrical Characteristics
3.3.1 Recommended DC Characteristics
Condition: Ta=25°C.
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.4 | 2.8 | 3.3 | V | Note1 |
| Supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage (L level) | VIL | 0 | --- | 0.3*IOVCC | V | Note1 |
| Input Voltage (H level) | VIH | 0.7*IOVCC | --- | IOVCC | V | Note1 |
3.3.2 Backlight LED Characteristics
The backlight consists of 4 Chip-White LEDs in parallel. The typical driving condition is IF=80mA, Vf=2.8~3.2V.
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Forward Voltage | Vf | 2.8 | - | 3.2 | V |
| Forward Current (Total) | IF | - | 80 | - | mA |
3.4 Interface Pin Assignment (18-Pin FPC)
The module communicates via an 18-pin FPC connector. The interface is 4-Wire SPI.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | VCI | P | Power supply |
| 3 | IOVCC | P | Power supply |
| 4 | TE | O | Tearing effect signal is used to synchronize MCU to frame memory writing. |
| 5 | SDA | I | Serial data input/output PIN |
| 6 | DC | I | Command and Data select pin |
| 7 | SCL | I | Serial clock pin |
| 8 | CS | I | Chip select pin |
| 9 | RESET | I | Reset pin. |
| 10 | GND | P | Ground |
| 11 | LEDA | P | Power for LED backlight anode |
| 12 | LEDK | P | Power for LED backlight cathode |
| 13 | TP_SDA/NC | - | TP I2C data / Not connect |
| 14 | TP_INT/NC | - | TP interrupt / Not connect |
| 15 | TP_SCL/NC | - | TP I2C clock / Not connect |
| 16 | TP_VDD/NC | - | TP power / Not connect |
| 17 | TP_RESET/NC | - | TP reset / Not connect |
| 18 | TP_GND/NC | - | TP ground / Not connect |
3.5 Serial Interface Timing (4-line serial)
The module communicates via a 4-wire SPI interface. The timing parameters for this interface are as follows:
Condition: VDDI=1.65 to 3.3V, VDD=2.4 to 3.3V, AGND=DGND=0V, Ta=25℃.
| Signal | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| CSX | TCSS | Chip select setup time (write) | TBD | - | ns |
| CSX | TCSH | Chip select hold time (write) | TBD | - | ns |
| CSX | TCHW | Chip select "H" pulse width | TBD | - | ns |
| SCL | TSCYCW | Serial clock cycle (Write) | TBD | - | ns |
| SCL | TSHW | SCL "H" pulse width (Write) | TBD | - | ns |
| SCL | TSLW | SCL "L" pulse width (Write) | TBD | - | ns |
| D/CX | TDCS | D/CX setup time | TBD | - | ns |
| SDA (DIN) | TSDS | Data setup time | TBD | - | ns |
Note: The manufacturer has marked the timing parameters as "TBD" (To Be Determined/Defined). For precise timing requirements, please refer to the full official datasheet or contact the manufacturer for the driver IC specification.
3.6 Electro-Optical Characteristics
Measuring Condition: Ta=25°C, dark room, 15min warm-up time.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr+Tf | θx = θy =0 | -- | 35 | 40 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy =0 | 900 | 1200 | -- | - | Note 2 |
| Transmittance | T% | θx = θy =0 | 4 | 4.7 | -- | % | Note 4.3 |
| Color Chromaticity (White) | W x | θx = θy =0 | -- | 0.308 | -- | - | Note 4.4 |
| Color Chromaticity (White) | W y | θx = θy =0 | -- | 0.339 | -- | - | Note 4.4 |
| Viewing angle (IPS) | θT, θB, θL, θR | CR > 10 | 80 | 85 | -- | Deg. | Note 3 |
3.7 Inspection Standards & Quality Control
The module is manufactured and inspected according to GB/T 2828-2003 (normal inspection, Class II).
- AQL (Acceptable Quality Level): Major Defect: 0.65 | Minor Defect: 1.5
- Inspection Criteria: Visual inspection at a distance of 30cm under normal lighting conditions with a 30W light source at a 45-degree angle.
- Defect Classification:
- Major Defects: Include missing display, line defects (missing line), flicker, overcurrent, voltage out of spec, pattern blur, Mura (ND filter 2% test), black/white dots greater than 0.3mm, missing line, and FPC copper screen peel.
- Minor Defects: Include glass damage (non-pin-side), polarizer scratches/bubbles, FPC impurities, black tape defects, and silicon/tuffy glue issues.
- Dot/Point Defect Criteria: As per the detailed specification table in the document, for example:
- Polarizer bubbles: ψ ≤ 0.3mm (2 allowed), 0.3mm < ψ ≤ 0.5mm (1 allowed), ψ > 0.5mm (0 allowed).
- Black/White dots (electrically active): ψ ≤ 0.15mm (disregard), 0.15mm < ψ ≤ 0.25mm (2 allowed), ψ > 0.3mm (0 allowed).
3.8 Design Notes from Documentation
- Mechanical Design Recommendations:
- Suggested housing visible area (shell opening) should be 0.3mm smaller than the VAmds (IPS viewing area) on each side. (Note 7)
- Suggested housing foam opening should be 0.6mm larger than the VAmds on each side. (Note 8)
- The edge of the Touch Panel (TP) must not contact any metal conductor. (Note 9)
- B/L Driver: The backlight consists of 4 Chip-White LEDs in parallel. An external current source or current limiting resistor is required. The typical driving condition is IF=80mA, Vf=2.8~3.2V.
- Interface: The module uses a 4-wire SPI interface. The pinout includes dedicated TP (touch panel) pins (13-18) which are marked as "NC/TP", suggesting the module may support a future capacitive touch panel addition.
- ESD Protection: Silver paste (银浆) is used for grounding. A yellow insulating tape (黄色绝缘胶纸) is placed on the back for safety.
- IPS Display: This module features IPS (In-Plane Switching) technology providing wide viewing angles (85 degrees typical in all four directions).
- RoHS: All materials are ROHS compliant.
- Connector: The FPC has 18 pins. The document shows an "易撕贴手撕位" (easy-tear tape handle) for convenient handling.
- General Tolerance: ±0.2mm for dimensions with decimal points, ±1/4° for angles.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires VCI (2.8V typical) and IOVCC (1.8V typical) power supplies. Ensure the power supplies are stable and have low ripple. The absolute maximum rating for VCC is 4.6V and for IOVCC is 4.0V.
- Interface: This module uses a standard 4-wire SPI protocol. The host processor must be configured for this protocol.
- Backlight Driver (External): A simple constant current source or current limiting resistor can be used to supply the backlight via the LEDA (Pin 11) and LEDK (Pin 12) pins. The required driving condition is 80mA total current at 2.8V~3.2V forward voltage.
- Reset: A hardware reset pin (RESET, Pin 9) is provided. Ensure proper reset timing as per the specifications.
- Mechanical Mounting: Follow the mechanical design notes for the enclosure and foam opening to ensure proper fit and avoid damage to the TP and LCD.
- Operating Temperature: The module operates from -10°C to +70°C. Satisfactory display performance is only guaranteed within this range.
- Storage: Store the module in a clean environment, free from dust, moisture, and direct sunlight. Storage temperature range is -20°C to +80°C.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD). The yellow insulating tape on the back should not be removed during installation.
5. Conclusion & Design-In Support
The LS024I46-S-V1 from Lesson Smart Display Technology is a 2.4-inch IPS TFT-LCD module with a 4-wire SPI interface. It features an IPS display for wide viewing angles, a high contrast ratio (1200:1 typical), and a robust mechanical design with ESD protection. It is a reliable, high-quality display solution suitable for a wide variety of embedded display applications.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and the driver IC datasheet for detailed initialization and timing parameters. Note that the SPI timing in the spec is marked as "TBD".
- Design a clean 2.8V/1.8V power supply for the LCD. Design a backlight constant current driver circuit capable of delivering 80mA at up to 3.2V.
- Configure the host processor's SPI interface to match the timing specifications detailed in this datasheet and the driver IC datasheet.
- Follow the mechanical design guidelines for the enclosure and foam opening to ensure proper fit and avoid damage.
- Contact the manufacturer for evaluation modules, sample requests, and further technical support during the design-in phase.
This module is designed to provide a reliable and vibrant display solution for a wide array of applications.
