LSC028I23-S-V1: 2.83-Inch IPS TFT LCD Module, 240×320 Resolution, SPI Interface, Integrated Capacitive Touch Panel
Product Subtitle / Keywords
2.83 Inch Display, 240(RGB)×320 Resolution, a-Si TFT-LCD Module, Transmissive, IPS, 262K Display Colors, SPI (4-Line Serial) Interface, Integrated Capacitive Touch Panel (CTP), Operating Temperature -10°C to +60°C, Storage Temperature -20°C to +70°C, Driver IC JD9853, Backlight Driving Condition IF=80mA, VF=3V (Typ), RoHS Compliant, Spec Rev 1.0, Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司).
1. Executive Summary & Product Positioning
The LSC028I23-S-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, which 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. The module type is COG+FPC+B/L.
This product specification (Revision 1.0) serves as the definitive technical document, defining the module's general description, physical features, mechanical specification, outline dimension (including detailed mechanical drawings for the LCM, with notes on operating/storage temperature, backlight driving conditions, and RoHS compliance), absolute maximum ratings (for supply voltage, operating temperature, and storage temperature), electrical characteristics (including recommended operating conditions for power supplies and logic levels), pin description (for the 21-pin main interface including CTP signals), and module function description (including block diagram and pin description).
The document provides the core parameters necessary for system integration into standard 2.83-inch portrait display applications with touch functionality. The unequivocal recommendation for engineers is to strictly adhere to the mechanical and electrical specifications described herein to ensure reliable performance and compatibility.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit. The panel can display up to 262k colors.
- Display Resolution: Portrait format: 240(RGB) × 320 pixel array.
- Display Mode: The document indicates this is an IPS (In-Plane Switching) display based on the general description and physical features typically associated with IPS technology (wide viewing angles).
- Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight).
- Interface Type: The module uses an SPI (Serial Peripheral Interface) for data and command communication. The interface signals include MOSI (data), SCLK (clock), A0 (data/command), CS (chip select), RST (reset), and TE (tearing effect).
- Power Architecture: Requires dual power supplies: VDD (3.3V Typ for the core/logic) and IOVCC (3.3V Typ for the I/O interface). The backlight is powered separately through dedicated LED_A and LED_K pins. The CTP also requires a dedicated 3.3V power supply (CTP_VDD).
- Backlight: White LED backlight consisting of 4 white LEDs in parallel. The driving condition is specified as IF=80mA, VF=3V (TYP).
- Touch Panel: The module includes an integrated Capacitive Touch Panel (CTP) interface as indicated by the pin description (CTP_SCL, CTP_SDA, CTP_INT, CTP_RST). The specific touch controller IC is not mentioned in the provided excerpt.
- Driver IC: JD9853.
- Supplier: 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Item | Specification | Unit |
|---|---|---|
| Model | LSC028I23-S-V1 | - |
| Display Size (Diagonal) | 2.83 | inch |
| Resolution | 240(RGB) × 320 | pixels |
| Display Colors | 262K | colors |
| Module Type | COG+FPC+B/L | - |
| Viewing Direction | ALL (as indicated in outline drawing for IPS) | - |
| Operating Temperature | -10 ~ +60 | °C |
| Storage Temperature | -20 ~ +70 | °C |
| RoHS Compliance | Yes | - |
3.2 Interface & Electrical Specifications
3.2.1 Absolute Maximum Ratings (From Section 5)
| Item | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply voltage | VDD | -0.3 | 5.0 | V |
| Supply voltage | IOVCC | -0.3 | 5.0 | V |
| Operating temperature | TOPR | -10 | 60 | °C |
| Storage temperature | TSTR | -20 | 70 | °C |
3.2.2 Recommended Operating Conditions (From Section 6)
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage (LCD Core/Logic) | VDD | 2.8 | 3.3 | 3.6 | V |
| Supply voltage (I/O) | IOVCC | 2.8 | 3.3 | 3.6 | V |
| Input Voltage 'L' level | VIL | 0 | --- | 0.3*IOVCC | V |
| Input Voltage 'H' level | VIH | 0.7*IOVCC | --- | IOVCC | V |
3.2.3 Pin Description (21-Pin Main Interface, From Section 7-2)
The module uses a 21-pin FPC connector which integrates the LCM and CTP interface signals.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LED_K | P | Power for LED backlight cathode |
| 2 | LED_A | P | Power for LED backlight anode |
| 3, 6 | GND | P | Ground |
| 4 | MOSI | I/O | Serial data input (SPI Data) |
| 5 | SCLK | I | Serial interface clock (SPI Clock) |
| 7 | A0 | I | Display data/command selection pin (SPI DC) |
| 8 | CS | I | Chip select pin (SPI CS) |
| 9 | RST | I | Reset signal for LCD (Active Low) |
| 10 | TE | O | Tearing effect output pin to synchronize MPU to frame writing, activated by S/W command. |
| 11 | IOVCC | P | Power Supply for I/O System (3.3V) |
| 12 | VDD | P | Power Supply for Core/Logic (3.3V) |
| 13, 14, 20, 21 | MESH0~3 | NC | No Connection (Mesh/pin for EMC) |
| 15 | CTP_VDD | P | Power Supply for CTP (3.3V) |
| 16 | CTP_SCL | I | SCL pin for TP (I²C clock) |
| 17 | CTP_SDA | I/O | SDA pin for TP (I²C data) |
| 18 | CTP_INT | I | Interrupt signal for TP |
| 19 | CTP_RST | I | Reset Pin for TP (Active Low) |
3.3 Timing Characteristics (From Section 7.4)
The document includes timing characteristics for the SPI interface and the reset sequence.
3.3.1 Reset Timing
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | $t_{RW}$ | Reset pulse width | 10 | - | μs |
| RESX | $t_{RT}$ | Reset complete time | - | 5 (Note 5) | ms |
3.4 Backlight Driving Conditions
The backlight circuit from the outline drawing notes: IF=80mA, VF=3V (TYP). This indicates 4 white LEDs in parallel, requiring a constant current driver capable of delivering 80mA at approximately 3V. The total backlight power is 80mA × 3V = 240mW.
3.5 Touch Panel Technical Parameters
The CTP interface is provided via the main FPC connector with dedicated pins for power (CTP_VDD), I²C communication (CTP_SCL, CTP_SDA), interrupt (CTP_INT), and reset (CTP_RST). The specific touch controller IC model is not detailed in the provided document excerpt.
4. Application Guidelines & Critical Notes
Intended Use
- Standard 2.83-inch portrait display applications (e.g., smart home panels, industrial handhelds, IoT devices).
- Systems requiring a QVGA (240×320) resolution with an IPS display for wide viewing angles.
- Applications requiring a built-in capacitive touch panel (CTP) interface.
- Systems utilizing an SPI interface for display communication.
Critical Design Considerations
- Dual Power Supply (VDD=3.3V for Core, IOVCC=3.3V for I/O): The module requires a stable 3.3V supply for both the core/analog circuitry and the I/O interface. The logic thresholds (VIL, VIH) are referenced to IOVCC.
- SPI Interface (4-Line Serial): The module uses a standard 4-line SPI interface with signals MOSI (Data), SCLK (Clock), A0 (Data/Command), and CS (Chip Select).
- External Backlight Driver (80mA @ 3V): The backlight consists of 4 LEDs in parallel, requiring a constant current driver capable of delivering 80mA at a forward voltage of 3V (Typ).
- I²C Capacitive Touch Panel Interface: The CTP uses an I²C interface (CTP_SCL, CTP_SDA) with a dedicated reset pin (CTP_RST) and an interrupt output (CTP_INT). The host must initialize the touch controller by providing a reset pulse and then communicate over I²C to configure and read touch data. The CTP requires a 3.3V power supply (CTP_VDD).
- IPS Display with ALL Viewing Direction: The display uses IPS technology, providing excellent viewing angles in all directions.
- Reset Sequence (tRW min 10us, tRT max 5ms): The RST pin (Pin 9) is an active-low reset signal. The module requires a reset pulse width of at least 10μs. After releasing the reset, the module's internal initialization takes up to 5ms (refer to Note 5). The host must allow this time before sending commands.
- TE (Tearing Effect) Pin: The TE pin (Pin 10) is an output from the driver IC that can be used to synchronize the host's frame writes to the display's internal frame memory. This prevents tearing artifacts.
- Temperature Range (-10°C to +60°C Operating): A limited consumer/industrial temperature range. It might not be suitable for extreme outdoor applications.
- Mechanical Integration (Notes from Outline Drawing): The mechanical drawing specifies the following critical notes: Suggested enclosure window should be 0.3mm smaller than the VA (Viewing Area) on each side. The CTP edge must not contact metal conductors. The general tolerance is ±0.20mm.
- ESD and Handling: Standard ESD precautions must be observed during handling and assembly.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass – handle with care. Avoid mechanical stress on the active area or FPC.
- Do not attempt to disassemble or modify the LCD module.
- The module is RoHS compliant.
5. Conclusion & Design-In Support
The LSC028I23-S-V1 specification details a versatile 2.83-inch QVGA (240×320) IPS TFT LCD module with an integrated capacitive touch panel interface, dual 3.3V power supply, and an SPI interface (driven by JD9853) — a suitable choice for embedded applications requiring a standard touch display with a simple, well-documented interface.
Key Strengths
- Simple SPI Interface: Easy to interface with most microcontrollers with minimal pin count.
- Integrated Capacitive Touch Panel (I²C): Provides a complete touch display solution.
- IPS Display Technology with Wide Viewing Angle: Superior wide viewing angles ensure excellent readability from any angle.
- Standard 2.83-inch Form Factor: Suitable for a wide range of portable and embedded designs.
- Detailed Pinout and Mechanical Notes: Clear pin assignments and mechanical guidance facilitate straightforward system integration.
Main Design Focus
- The critical design tasks are providing a stable 3.3V power supply for both VDD and IOVCC with proper decoupling, implementing a constant-current LED backlight driver (80mA at 3V), configuring the host processor's SPI interface (MOSI, SCLK, A0, CS) with the correct timing (refer to the JD9853 datasheet), and initializing and communicating with the touch controller over I²C (CTP_SCL, CTP_SDA, CTP_INT, CTP_RST).
- Supporting requirements: Connect all ground pins. Ensure the RST pin is driven low for at least 10μs for a proper reset sequence. Allow 5ms after reset before communication. Integrate the TE pin for frame synchronization if required.
This module is a practical choice for engineers designing embedded systems that require an easy-to-use SPI-based touch display with good IPS viewing angles and a standard I²C touch interface.
