LS028I42-M-V1 2.83 inch TFT-LCD Module 240x320 262K Colors
1. Executive Summary & Product Positioning
The LS028I42-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). The panel size is 2.83 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 2026-07-07.
Product Positioning: This 2.83-inch module is well-suited for a wide range of applications requiring a compact, high-quality display with a wide viewing angle. 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: 2.83-inch diagonal, a-Si TFT active matrix, transmissive, IPS (In-Plane Switching) with full viewing direction. Resolution is 240(RGB) × 320 pixels.
- Driver Circuit: The module integrates the ST7789P3 driver IC, communicating via an 8080 MCU Parallel Interface (8-bit/9-bit).
- Backlight Unit (B/L): A white LED backlight with 4 Chip-White LEDs configured in parallel. The typical driving condition is IF=80mA, Vf=3.1V.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The LCM outer dimension is 50.0 mm (width) with a general thickness of the active area.
- Interface: The module communicates via a 22-pin FPC connector. The display interface is 8080 MCU Parallel Interface (8/9-bit).
- 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) | 2.83 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 |
| Input Data Interface | 8080 MCU Parallel Interface (8/9-bit) |
| Driver IC | ST7789P3 |
| LCM Outer Dimension (WxH) | 50.0 mm (Width) (see drawing for full details) |
| Display Mode | Transmissive, IPS |
| Viewing Direction | Full (IPS) |
| Backlight Type | 4 Chip-White LEDs, Parallel |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°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 | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 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=3.1V (TYP).
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Forward Voltage | Vf | - | 3.1 | - | V |
| Forward Current (Total) | IF | - | 80 | - | mA |
3.4 Interface Pin Assignment (22-Pin FPC)
The module communicates via a 22-pin FPC connector. The interface is an 8080 MCU Parallel Interface (8/9-bit).
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | LEDA | P | Power for LED backlight anode |
| 3 | LEDA | P | Power for LED backlight anode |
| 4 | LEDK | P | Power for LED backlight cathode |
| 5 | LEDK | P | Power for LED backlight cathode |
| 6 | TE | O | Tearing effect signal is used to synchronize MCU to frame memory writing. |
| 7 | D7 | I | Interface data bus |
| 8 | D6 | I | Interface data bus |
| 9 | D5 | I | Interface data bus |
| 10 | D4 | I | Interface data bus |
| 11 | D3 | I | Interface data bus |
| 12 | D2 | I | Interface data bus |
| 13 | D1 | I | Interface data bus |
| 14 | D0 | I | Interface data bus |
| 15 | RD | I | Read enable in 8080 MCU parallel interface |
| 16 | WR | I | Write enable in MCU parallel interface. |
| 17 | RS | I | Display data/command selection pin in parallel interface. |
| 18 | CS | I | Chip selection pin |
| 19 | RESET | I | This signal will reset the device and it must be applied to properly initialize the chip. |
| 20 | VCI | P | Power Supply |
| 21 | VCI | P | Power Supply |
| 22 | GND | P | Ground |
3.5 Parallel Interface Timing (8080 MCU Interface)
The module supports an 8080-series MCU parallel interface with 8 or 9-bit bus width. The timing parameters are characterized under the following conditions:
Condition: VDDI=1.65 to 3.3V, VDD=2.4 to 3.3V, AGND=DGND=0V, Ta=25℃.
| Signal | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| D/CX | TAST | Address setup time | TBD | - | ns |
| D/CX | TAHT | Address hold time (Write/Read) | TBD | - | ns |
| CSX | TCHW | Chip select "H" pulse width | TBD | - | ns |
| CSX | TCS | Chip select setup time (Write) | TBD | - | ns |
| WRX | TWC | Write cycle | TBD | - | ns |
| WRX | TWRH | Control pulse "H" duration | TBD | - | ns |
| D[8:0] | TDST | Data setup time | TBD | - | ns |
| D[8:0] | TDHT | Data hold time | TBD | - | ns |
Note: The manufacturer has marked the timing parameters in the preliminary specification as "TBD" (To Be Determined). For precise timing requirements, please refer to the full official datasheet or the ST7789P3 driver IC specification.
3.6 Electro-Optical Characteristics
Measuring Condition: Ta=25°C, dark room.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr+Tf | θx = θy =0 | -- | -- | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy =0 | 1000 | 1500 | -- | - | Note 2 |
| Transmittance | T% | θx = θy =0 | 4.5 | 4.8 | -- | % | - |
| Color Chromaticity (White) | W x | θx = θy =0 | -- | 0.301 | -- | - | - |
| Color Chromaticity (White) | W y | θx = θy =0 | -- | 0.320 | -- | - | - |
| Viewing angle (IPS) | θT, θB, θL, θR | CR > 10 | -- | 85 | -- | Deg. | Note 3 |
3.7 Design Notes from Documentation
- Mechanical Design Recommendations:
- Suggested enclosure visible area (housing opening) should be 0.3mm smaller than the VAmds (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 driving condition is IF=80mA, Vf=3.1V (TYP) for 4 parallel LEDs.
- Interface: The module uses an 8080 MCU parallel interface (8/9-bit). The pinout does not include dedicated touch panel (TP) pins.
- ESD Protection: A yellow insulating tape (黄色绝缘胶纸) is used for insulation on the back. Silver paste (银浆点) is used for grounding.
- IPS Display: This module features IPS (In-Plane Switching) technology providing a full 85-degree viewing angle in all four directions.
- RoHS: All materials are ROHS compliant.
- Parallel Interface Timing: The timing parameters in this preliminary specification are marked as "TBD" (To Be Determined).
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 8080 MCU parallel interface. The host processor must be configured for this protocol.
- Backlight Driver (External): A constant current driver is required to supply the backlight via the LEDA (Pins 2, 3) and LEDK (Pins 4, 5) pins. The required driving condition is 80mA total current at 3.1V typical forward voltage.
- Reset: A hardware reset pin (RESET, Pin 19) is provided. Ensure proper reset timing as per the ST7789P3 driver IC 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 -20°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 -30°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 LS028I42-M-V1 from Lesson Smart Display Technology is a 2.83-inch IPS TFT-LCD module with an 8080 MCU parallel interface. It features a high contrast ratio (1500:1 typical), a full 85° viewing direction, and a robust mechanical design. 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 (ST7789P3) datasheet for detailed initialization and timing parameters.
- 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 3.3V.
- Configure the host processor's 8080 MCU parallel interface to match the timing specifications from the ST7789P3 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.
