LS028I41-S-V1 2.83 inch TFT-LCD Module 240x320 262K Colors
1. Executive Summary & Product Positioning
The LS028I41-S-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.
Product Positioning: This 2.83-inch module is well-suited for a wide range of applications requiring a compact, high-resolution 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). Resolution is 240(RGB) × 320 pixels.
- Driver Circuit: The module integrates the JD9853 driver IC, communicating via an SPI (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=3V.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The module dimensions are 50.0 × 69.1 × 2.3 mm.
- Interface: The module communicates via a 15-pin FPC connector. The display interface is SPI (Serial Peripheral Interface).
- Display Mode: Transmissive, IPS.
- Viewing Direction: Free (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 | SPI |
| Driver IC | JD9853 |
| Module Size (H×V×D) | 50.0 × 69.1 × 2.3 mm |
| Active Area (H×V) | 43.2 × 57.60 mm |
| Display Mode | Transmissive, IPS |
| Viewing Direction | Free (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 | 3.6 | V | Note1 Note2 |
| Supply voltage | IOVCC | -0.3 | 3.6 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | - |
| Storage temperature | TSTR | -30 | 80 | °C | - |
3.3 Electrical Characteristics
3.3.1 Backlight LED Characteristics
The backlight consists of 4 Chip-White LEDs in parallel. The typical driving condition is IF=80mA, Vf=3.0V.
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Forward Current (Total) | IF | - | 80 | - | mA |
| Forward Voltage | Vf | - | 3 | - | V |
3.4 Interface Pin Assignment (15-Pin FPC)
The module communicates via a 15-pin FPC connector with an SPI interface.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Power for LED backlight cathode |
| 2 | GND | P | Ground |
| 3 | TE | O | Tearing effect output pin to synchronize MPU to frame writing |
| 4 | SDA | I/O | Serial data input/output PIN |
| 5 | RS | I | Command and Data select pin |
| 6 | SCK | I | Serial clock pin |
| 7 | CS | I | Chip select pin |
| 8 | RESET | I | Reset pin. |
| 9 | IOVCC | P | power supply |
| 10 | VCC | P | power supply |
| 11 | VCC | P | power supply |
| 12 | GND | P | Ground |
| 13 | GND | P | Ground |
| 14 | LEDA | P | Power for LED backlight anode |
| 15 | LEDA | P | Power for LED backlight anode |
3.5 Reset Input Timing
The reset operation is essential for the correct initialization of the module.
| Item | Symbol | Related pins | Min. | Max. | Unit |
|---|---|---|---|---|---|
| Reset pulse width | tRW | RESX | 10 | - | μs |
| Reset complete time | tRT | - | - | 5 (Note 5) | ms |
Note: Spikes shorter than 5 µs on RESX are rejected. Pulses longer than 10 µs will cause a reset.
3.6 Electro-Optical Characteristics
Measuring Condition: Ta=25℃, 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 | -- | 0.302 | -- | - | - |
| 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 is 0.3mm smaller than the module's VAMds (Viewing Area MDS) on each side.
- Suggested housing foam opening is 0.6mm larger than the VAMds on each side.
- The edge of the Touch Panel (TP) must not contact any metal conductor.
- B/L Driver: The backlight driving condition is IF=80mA, Vf=3V (TYP) for 4 LEDs in parallel. An external current source or current limiting resistor is required.
- Interface: The module uses a standard SPI interface with chip select (CS), serial clock (SCK), data/command (RS), and serial data (SDA). A TE (Tearing Effect) pin is also available for frame synchronization.
- IPS Display: This module features IPS (In-Plane Switching) technology providing a free viewing direction with 85 degrees in all four directions.
- RoHS: All materials are ROHS compliant.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires VCC and IOVCC (both up to 3.6V according to absolute maximum ratings). Ensure the power supplies are stable and have low ripple.
- Interface: This module uses a standard 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 and LEDK pins. The required driving condition is 80mA total current at 3V forward voltage. The backlight consists of 4 parallel LEDs.
- Reset: A hardware reset pin (RESET, Pin 8) is provided. The reset pulse must be at least 10 µs low. After releasing the reset, a minimum wait time of 5ms is required before sending commands. Spikes shorter than 5µs on the reset line will be rejected.
- Operating Temp: The module operates from -20°C to +70°C. Satisfactory display performance is only guaranteed within this range.
- Storage: Storage temperature range is -30°C to +80°C. Avoid high temperature and humidity during storage.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD). Avoid applying pressure to the display surface.
5. Conclusion & Design-In Support
The LS028I41-S-V1 from Lesson Smart Display Technology is a 2.83-inch IPS TFT-LCD module with an SPI interface. It features a high contrast ratio (1500:1 typical) and a free viewing direction (85° all). 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 (JD9853) datasheet for detailed initialization and timing parameters.
- Design a clean power supply for the LCD. Design a backlight constant current driver circuit capable of delivering 80mA at 3V.
- Configure the host processor's SPI interface to match the timing specifications detailed in this 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.
