LSC028I40-S-V1 2.83 Inch TFT-LCD Module 240x320 262K Colors
【LSC028I40-S-V1】2.8寸LCD显示模组 分辨率240*320 驱动ICJD9853 规格书1. Executive Summary & Product Positioning
The LSC028I40-S-V1 is a 2.83-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module with an integrated Capacitive Touch Panel (CTP), developed by 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). The module is composed of a TFT-LCD panel, a driver circuit, a backlight unit, and a CTP. The panel size is 2.83 inch and the resolution is 240(RGB)×320, the panel can display up to 262k colors. This module features a COG (Chip-on-Glass) + FPC + B/L (Backlight) + CTP construction and is designed for a wide range of applications requiring a compact, high-quality display with touch capability. [1](@index-ref?id=1)[2](@index-ref?id=2)
Product Positioning: This 2.83-inch module is ideally suited for compact handheld devices, portable instruments, smart home controllers, and other embedded systems that require both a vivid display and intuitive user interaction via touch.
2. Detailed Product Overview & Architecture
The module's architecture integrates the display and touch into a single, easy-to-integrate package. 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 ST7789V driver IC, communicating via a 4-Wire SPI (Serial Peripheral Interface).
- Backlight Unit (B/L): A white LED backlight. The typical driving condition is IF=120mA, Vf=3.1V (TYP).
- Capacitive Touch Panel (CTP): An integrated CTP with OGS (One Glass Solution) structure, using a COB (Chip-on-Board) IC. The touch panel has a surface hardness of ≥5H (500gf) and light transmittance of ≥85%.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L + CTP.
- Interface: The module communicates via a 15-pin FPC connector for the display and a separate CTP interface. The display interface is 4-Wire SPI.
- Display Mode: Transmissive, IPS.
- Viewing Direction: ALL O'Clock (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+CTP |
| Color Depth | 262K Colors |
| Input Data Interface | 4-Wire SPI (Serial) |
| Driver IC | ST7789V |
| Touch Panel Type | Capacitive Touch Panel (CTP), OGS Structure, COB IC |
| Display Mode | Transmissive, IPS |
| Viewing Direction | ALL O'Clock (IPS) |
| Backlight Type | White LED (Parallel) |
| Operating Temperature | -20°C to +70°C (≤90% RH) |
| Storage Temperature | -30°C to +80°C (≤90% RH) |
| 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 | 4.6 | 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: VDDI=1.65V to 3.3V, VDD=2.6V to 3.3V, AGND=DGND=0V, Ta=25℃.
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.6 | 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 a parallel configuration of white LEDs. The typical driving condition is IF=120mA, Vf=3.1V (TYP).
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | Vf | 3.1 | V |
| Forward Current | IF | 120 | mA |
3.4 Interface Pin Assignment
3.4.1 LCD Interface Pin Description (15-Pin FPC)
The module communicates via a 15-pin FPC connector. The interface is a 4-Wire Serial SPI.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Power for LED backlight cathode |
| 2 | GND | P | Ground |
| 3 | TE | O | Tearing effect signal is used to synchronize MCU to frame memory writing |
| 4 | SDA | I/O | Serial data input/output PIN |
| 5 | RS | I | Command and Data select pin (DCX) |
| 6 | SCK | I | Serial clock pin |
| 7 | CS | I | Chip select pin |
| 8 | RESET | I | Reset pin |
| 9 | IOVCC | P | I/O power supply (1.65V-3.3V) |
| 10 | VCC | P | Power supply (2.6V-3.3V) |
| 11 | VCC | P | Power supply (2.6V-3.3V) |
| 12 | GND | P | Ground |
| 13 | GND | P | Ground |
| 14 | LEDA | P | Power for LED backlight anode |
| 15 | LEDA | P | Power for LED backlight anode |
3.4.2 CTP Interface Pin Description
The integrated CTP uses a 15-pin interface with 12 induction channels (S1-S12) and ground pins.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | P | Ground |
| 2 | S12 | I/O | Induction Channel |
| 3 | S11 | I/O | Induction Channel |
| 4 | S10 | I/O | Induction Channel |
| 5 | S9 | I/O | Induction Channel |
| 6 | S8 | I/O | Induction Channel |
| 7 | S7 | I/O | Induction Channel |
| 8 | S6 | I/O | Induction Channel |
| 9 | S5 | I/O | Induction Channel |
| 10 | GND | P | Ground |
| 11 | S4 | I/O | Induction Channel |
| 12 | S3 | I/O | Induction Channel |
| 13 | S2 | I/O | Induction Channel |
| 14 | S1 | I/O | Induction Channel |
| 15 | GND | P | Ground |
3.5 Interface Timing Characteristics (4-Line SPI)
Condition: Ta=25°C, VDDI=1.65~3.3V, VDD=2.5~3.7V.
| Signal | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| SCL (Read) | TSHR | SCL "H" Pulse Width (Read) | 60 | - | ns |
| SCL (Read) | TSLR | SCL "L" Pulse Width (Read) | 60 | - | ns |
| D/CX | TDCS | D/CX Setup Time | 10 | - | ns |
| D/CX | TDCH | D/CX Hold Time | 10 | - | ns |
| SDA (DIN/DOUT) | TSDS | Data Setup Time | 10 | - | ns |
| SDA (DIN/DOUT) | TSDH | Data Hold Time | 10 | - | ns |
| SDA (DOUT) | TACC | Access Time (Read) | 10 | 50 | ns |
3.6 CTP Technical Specifications
The integrated CTP (Capacitive Touch Panel) has the following key parameters:
| Item | Specification |
| TP Structure | OGS (One Glass Solution) |
| IC Model | COB (Chip-on-Board) |
| Surface Hardness | ≥5H (500gf) |
| Light Transmittance | ≥85% |
| TP Channels | 4-line, 1-channel (RX/TX) |
| TP Warpage | ≤0.4mm |
| Printing | Silk screen black |
3.7 Design Notes from Documentation
- Mechanical Design Recommendations:
- Suggested housing visible area (shell opening) should be 0.3mm smaller than the VA (Viewing Area) on each side.
- Suggested housing foam opening should be 0.6mm larger than the VA on each side.
- General tolerance for unspecified dimensions: ±0.2mm.
- B/L Driver: The backlight is a parallel configuration with a typical driving condition of 120mA at 3.1V. A constant current driver for the backlight is required.
- Interface: The module uses a 4-wire SPI interface for the display. The pinout includes Serial Clock (SCK), Serial Data (SDA), Data/Command select (RS/DCX), Chip Select (CS), Reset (RESET), and Tearing Effect (TE).
- IPS Display: This module features IPS (In-Plane Switching) technology for wide viewing angles (ALL O'Clock).
- CTP: The integrated touch panel uses an OGS structure with 12 induction channels (S1-S12).
- RoHS: All materials are ROHS compliant.
4. Application Guidelines & Critical Notes
- Power Supply: The module requires VCC (2.8V typical) and IOVCC (1.8V typical) power supplies. Ensure the power supplies are stable and have low ripple.
- Interface: This module uses a standard 4-wire SPI protocol. The host processor must be configured for this protocol. The RS (DCX) pin is used to select between command and data modes.
- Touch Panel: The integrated CTP uses a 15-pin interface with 12 induction channels. The TP edge must not contact any metal conductor.
- Backlight Driver: A constant current driver is required to supply the backlight via the LEDA (Pins 14, 15) and LEDK (Pin 1). The required driving condition is 120mA total current at 3.1V typical forward voltage.
- Reset: Ensure the RESET pin (Pin 8) is driven low for a sufficient pulse width to initiate a proper reset before initializing the display.
- Mechanical Mounting: Follow the mechanical design notes for the enclosure and foam opening to ensure proper fit and avoid damage to the glass and FPC.
- Operating Temperature: The module operates from -20°C to +70°C (≤90% RH). 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 (≤90% RH).
- 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 LSC028I40-S-V1 from Lesson Smart Display Technology is a 2.83-inch IPS TFT-LCD module with an integrated Capacitive Touch Panel and a 4-wire SPI interface. It features a 240x320 resolution, 262K colors, an integrated CTP with OGS structure, a simple SPI interface, and a robust mechanical design. It is a reliable, all-in-one display solution suitable for a wide variety of compact embedded display applications requiring touch input.
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 (ST7789V) and touch IC datasheets for detailed initialization and timing parameters.
- Design a clean 2.8V power supply for the LCD. Design a backlight constant current driver circuit capable of delivering 120mA at up to 3.3V.
- 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 to the integrated touch lens.
- 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.
