LS028I13-M-V1 2.83 inch TFT-LCD Module 240x320 262k Colors IPS
1. Executive Summary & Product Positioning
The LS028I13-M-V1 is a 2.83-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). It is composed of a TFT-LCD panel, a driver circuit, and a backlight unit. The panel size is 2.83 inch and the resolution is 240(RGB)*320, the panel can display up to 262k colors.
Product Positioning: This module features a 2.83-inch IPS panel, offering superior viewing angles (Free/IPS) and high color performance (262k colors). With a standard 8bit 8080 parallel interface and a robust COG+FPC+B/L construction, it is well-suited for applications that require fast updates and a reliable connection, such as industrial control panels, medical devices, and handheld instruments.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 2.83-inch diagonal, a-Si TFT active matrix, transmissive, IPS mode. Resolution is 240(RGB) × 320 pixels with an active area of 43.2 (H) × 57.6 (V) mm.
- Driver Circuit: The module integrates a driver IC (ST7789P3), communicating via an 8bit 8080 Parallel 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=3.0V (TYP).
- Mechanical Construction: COG (Chip-on-Glass) + FPC (with steel plate reinforcement, total thickness ~0.2+0.15=0.35mm) + B/L. The total module thickness is 2.3±0.1 mm.
- Interface: The module communicates via a 24-pin FPC connector. The display interface is 8bit 8080 Parallel.
- Viewing Direction (Grayscale Inversion): IPS (Free).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 2.83 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 |
| Viewing Direction (Grayscale Inversion) | Free (IPS) |
| Input Data Interface | 8bit 8080 Parallel |
| Driver IC | ST7789P3 |
| Module Outline Size (H×V×D) | 46.2 × 69.2 × 2.3 mm (Typ, based on drawing) |
| Active Area (AA, H×V) | 43.2 × 57.6 mm |
| Display Mode | Active matrix TFT, Transmissive type |
| Backlight Type | 4 Chip-White LED, Parallel |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage.
| 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 | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
3.3 Electrical Characteristics
3.3.1 Recommended Operating Conditions
Condition: Ta=25°C.
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.4 | 2.8 | 3.3 | V |
| I/O 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 |
3.3.2 Backlight LED Characteristics
The backlight consists of 4 Chip-White LEDs in Parallel. The backlight drive condition is IF=80mA, Vf=3V (TYP).
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | Vf | 3.0 | V |
| Forward Current (Total) | IF | 80 | mA |
3.4 Electro-Optical Characteristics
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Response time | Tr + Tf | θx = θy =0 | --- | --- | 35 | ms |
| Contrast Ratio | CR | θx = θy =0 | 1000 | 1500 | --- | --- |
| Luminance (IF=80mA) | L | --- | --- | 300 | --- | cd/m2 |
| Viewing angle (CR>10) | θT, θB, θL, θR | --- | --- | 85 (All) | --- | Deg. |
3.5 Interface Pin Assignment (24-Pin FPC)
Connector: F05A1-B-24-P-T-S (24-pin). Interface: 8bit 8080 Parallel.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1-2 | GND | P | Ground |
| 3 | LEDA | P | Power for LED backlight anode |
| 4 | LEDK | P | Power for LED backlight cathode |
| 5-6 | VCI | P | Power Supply |
| 7 | GND | P | Ground |
| 8 | TE | O | Tearing effect signal, used to synchronize MCU to frame memory writing. |
| 9 | CS | I | Chip selection pin |
| 10 | RS | I | Display data/command selection pin in parallel interface. |
| 11 | WR | I | Write enable in MCU parallel interface. |
| 12 | RD | I | Read enable in 8080 MCU parallel interface. |
| 13 | GND | P | Ground |
| 14-21 | D0-D7 | I | Interface data bus. |
| 22 | RESET | I | This signal will reset the device and it must be applied to properly initialize the chip. |
| 23-24 | GND | P | Ground |
3.6 Timing Characteristics
The timing parameters for the 8080 interface are listed as TBD (To Be Determined) in the provided specification excerpt. For precise timing, please consult the official datasheet and the driver IC (ST7789P3) manufacturer's documentation.
The Timing Characteristics section describes signals including D/CX, CSX, WRX, RDX, and D[8:0] for both write and read operations.
3.7 Design Notes from Documentation
- B/L Driver: The backlight driving condition is IF=80mA, Vf=3V (TYP) for 4 parallel LEDs.
- Mechanical: Tolerance of segments to edge of glass: ±0.2mm. The FPC includes steel plate reinforcement with a total thickness of 0.2mm (FPC) + 0.1mm (Steel) + 0.05mm (Double-sided tape) = approx. 0.35mm. Yellow insulating tape is used for protection. Conductive silver dots (银浆点) are noted.
- Housing: It is recommended that the housing visual area be at least 0.3mm smaller than the VA on each side. The housing foam window should be at least 0.6mm larger than the VA on each side. The TP edge should not contact metal conductors to avoid ESD or short circuit risks.
- RoHS: RoHS compliance is expected.
- Storage: Storage temperature: -30°C to 80°C.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires a 2.8V (Typ.) power supply for VCI and 1.8V (Typ.) for IOVCC. Ensure the power supply ripple is minimized.
- Interface: This module uses a standard 8bit 8080 Parallel Interface protocol. The host microcontroller must be configured for this protocol, managing signals such as CS, RS, WR, RD, and the 8-bit data bus (DB0-DB7).
- Backlight Driver (External): An external constant current driver is required to supply a typical total current of 80mA at a forward voltage of 3.0V.
- Reset: A hardware reset pin (RESET, Pin 22) is provided. A low pulse is required for a valid reset to initialize the chip properly.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD).
5. Conclusion & Design-In Support
The LS028I13-M-V1 from Lesson Smart Display Technology is a 2.83-inch IPS TFT-LCD module with an 8bit 8080 parallel interface. It is a standard-resolution display solution with wide viewing angles, making it suitable for applications that require fast and reliable parallel data transfer.
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 (ST7789P3) datasheet for detailed command initialization and timing parameters.
- Design a clean 2.8V/1.8V power supply and a backlight constant current driver circuit capable of delivering 80mA at 3.0V.
- Configure the host MCU's parallel interface to match the 8-bit 8080 protocol.
- 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.
