LSC0154I04-S-V1: 1.54-inch TFT LCD Module, 240×240, COG+FPC+B/L+CTP, 262K Colors, Transmissive
Product Subtitle / Keywords
1.54 Inch Display, 240(RGB)×240 Resolution, Transmissive a-Si TFT-LCD Module, COG+FPC+B/L+CTP Module Type, SPI Interface, 262K Colors, Module Size: 37.95 × 44.85 × 3.15 mm, Active Area: 27.72 × 27.72 mm, Operating Temp: -20°C ~ 70°C, Storage Temp: -30°C ~ 80°C, RoHS Compliant, with Capacitive Touch Panel (CTP)
1. Executive Summary And Product Positioning
The LSC0154I04-S-V1 is a 1.54-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, manufactured by Lesson (Wanan) Smart Display Technology Co., Ltd. This product is a sophisticated visual output solution that integrates a high-resolution display panel with essential driving and backlight components, packaged in a compact form factor.
This product specification (Revision 1.0) serves as the definitive technical document for the LSC0154I04-S-V1. It is composed of a TFT-LCD panel, a driver circuit, a backlight unit (B/L), and notably includes a capacitive touch panel (CTP), making it an integrated Human-Machine Interface (HMI) component. The panel has a resolution of 240(RGB)*240 and can display up to 262k colors.
The unequivocal recommendation for engineers is to strictly adhere to the absolute maximum ratings, electrical specifications, and interface timing described herein to ensure reliable performance and compatibility within the intended application. Failure to operate within these limits can lead to permanent damage, degraded optical performance, or reduced product lifespan.
2. Detailed Product Overview And Architecture
The LSC0154I04-S-V1 is engineered for devices that demand a sharp, colorful display with user touch input in a small footprint. Its architecture is built around several key technologies and design choices:
- Core Technology: Transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module. This widely adopted technology uses a thin layer of amorphous silicon to create transistors that actively control each pixel. This allows for high resolutions, fast response times, and excellent color reproduction compared to passive matrix displays, making it ideal for dynamic graphical content.
- Module Type: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight) + CTP (Capacitive Touch Panel). This construction is a hallmark of modern compact displays. The driver IC is directly mounted onto the LCD glass (COG), minimizing space and interconnect complexity. The FPC provides a flexible connection to the host system, simplifying integration. The B/L is essential for making the transmissive LCD visible. The inclusion of a CTP provides native touch input capability, eliminating the need for separate touch sensor integration.
- Display Format: Graphic 240(RGB) × 240 pixel array. This square resolution is excellent for menu-driven interfaces, analog gauges, or smartwatch displays where the aspect ratio is not critical. The RGB stripe arrangement provides full color mixing capability for each pixel.
- Display Characteristics: Capable of displaying up to 262k colors. This corresponds to a 6-bit color depth per primary color (Red, Green, Blue), allowing the module to generate 262,144 distinct colors. This is sufficient for most user interfaces, icons, and simple graphics, offering smooth transitions without visible color banding.
- Interface Type: The module is designed to be controlled via a 4-line Serial SPI (Serial Peripheral Interface) interface. This common and efficient interface uses minimal I/O pins (typically SCLK, MOSI, MISO, CS) to communicate commands and data, making it suitable for a wide range of microcontrollers.
- Polarizer Viewing Direction: The specification indicates a specific polarizer configuration, which influences the optimal viewing angle. While details are in the full document, this typically defines the direction from which the display has the best contrast and color accuracy.
- Backlight Unit: The module utilizes a white LED backlight, configured in parallel. The driving conditions are: IF=60mA and Vf=3V (Typical). Engineers must provide a constant current source or appropriate current-limiting resistor to drive the backlight within these parameters to ensure consistent brightness and longevity.
- Special Features: Integrated capacitive touch panel (CTP), compact size for space-constrained designs, high resolution for its size, compatible with standard SPI interface, and compliant with the RoHS (Restriction of Hazardous Substances) directive.
- Approval Status: Approved Product Specification only (Revision 1.0).
3. Exhaustive Technical Specifications
3.1 Mechanical & General Specification
This section provides the physical dimensions and other key general parameters of the module. The module is designed to be compact and lightweight, making it suitable for portable or space-constrained devices. The exact outline dimensions, including the active area, are critical for mechanical design integration. The 1.54-inch diagonal size is ideal for applications like smartwatches, IoT control panels, and medical handhelds.
| Parameter | Specification | Unit |
|---|---|---|
| Panel Size | 1.54'' (Diagonal) | Inch |
| Resolution | 240(RGB)*240 | pixels |
| Display Type | Transmissive | - |
| Display Colors | 262k | colors |
| Module size (H×V×D) | 37.95 × 44.85 × 3.15 | mm |
| Active area (H×V) | 27.72 × 27.72 | mm |
| Dot Arrangement | 240RGB(H)*240(V) Dots | - |
| Module Type | COG+FPC+B/L+CTP | - |
| Polarizer | Upper fine sand 7' / Lower light 8' | - |
3.2 Absolute Maximum Ratings
The absolute maximum ratings are stress limits. Operating the module at or beyond these values can result in irreversible damage. Functional operation should always be within the recommended operating conditions.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage (I/O) | IOVCC | -0.3 | 4.6 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
Note1: These values are absolute maximum ratings. Exceeding these values may cause permanent damage to the device.
Note2: All voltages are referenced to GND. The module should not be operated outside the recommended range even briefly.
3.3 Electrical Characteristics
These are the recommended operating conditions for the module. The module has two main power supply inputs: VCC for the core logic and panel driver, and IOVCC for the I/O interface level. This split rail design allows for flexible integration with host microcontrollers that may operate at different voltage levels (e.g., a 3.3V system with a 1.8V I/O interface).
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage (Main) | VCC | 2.4 | 2.75 | 3.3 | V |
| Supply voltage (I/O) | 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 |
3.4 Backlight Circuit Diagram & Driving Conditions
The module uses a white LED backlight to illuminate the display. The backlight is composed of LEDs connected in a parallel configuration. This means all LEDs share the same voltage but the total current is the sum of the current through each LED. The specified driving conditions are as follows:
- Driving Current (IF): 60 mA (This is the total current to be supplied to the backlight LED string.)
- Driving Voltage (Vf): 3.0 V (Typical) (This is the typical forward voltage drop across the LED string at the specified current.)
- LED Connection: Parallel
Design Guidance: Engineers should never connect the backlight directly to a voltage source without current limiting. A resistor or a constant current driver IC is essential. If using a resistor, the value (R) can be roughly calculated as R = (V_source - Vf) / IF, where V_source is the supply voltage. For example, with a 5V supply, R = (5V - 3.0V) / 0.06A = 33.3 ohms, so a standard 33-ohm resistor would be used. The resistor must also be rated for the power dissipation.
4. Application Scenario
The LSC0154I04-S-V1 is a compact, feature-rich display module with an integrated touch panel, making it an excellent choice for any embedded system that requires a visual output and user input in a small, integrated package. Its 1.54-inch diagonal size, combined with a 240x240 resolution, provides a sharp and detailed image for icons, text, and simple graphics. The 262K color capability allows for a visually appealing user interface.
Key application areas are numerous and diverse:
- Smart Wearables: Smartwatches and fitness bands are primary targets. The compact size, high resolution, and integrated touch allow for a modern, interactive user experience with swipe, tap, and menu navigation.
- Handheld Instruments: Multimeters, oscilloscopes, and other portable test equipment benefit from a clear, readable display with touch control for mode selection, measurement viewing, and data logging.
- Human-Machine Interfaces (HMI): Compact industrial controllers, smart home hubs, and IoT device control panels can use this module for a localized, intuitive interface.
- Medical Devices: Portable diagnostic tools, medical monitoring devices, and drug delivery systems can utilize this display for data presentation and touch-based navigation.
- Consumer Electronics: Remote controls, smart appliances, and point-of-sale (POS) terminals for compact spaces benefit from the all-in-one display and touch solution.
The module's standard SPI interface simplifies integration with virtually any microcontroller, while its integrated CTP eliminates complex touch controller integration. Designers must ensure their application's operating environment stays within the -20°C to 70°C range to guarantee optimal performance and reliability.
5. Handling Precautions And Compliance
The LCD panel is made of glass and is fragile. The polarizer surface is easily scratched. The module should be handled with care to avoid applying pressure on the display area, especially the back of the LCD. ESD (Electrostatic Discharge) protection is mandatory throughout handling, assembly, and testing. Use grounded wrist straps, conductive work surfaces, and anti-static packaging. FPC is also delicate; avoid sharp bends at the connector interface.
The module should be stored in a clean, dry environment away from direct sunlight, high temperatures, and corrosive gases. The recommended storage temperature is -30°C to 80°C. It is strongly recommended to use the module within six months of manufacturing, and after one year of storage, the electrical and optical characteristics should be re-validated.
It is strongly recommended to read the full specification document (LSC0154I04-S-V1 Product Specification Revision 1.0) before integration and to test the module under application-specific conditions. The manufacturer disclaims liability for damages resulting from improper use, modification, or failure to follow these guidelines.
The product is compliant with the RoHS (Restriction of Hazardous Substances) directive. Proper waste disposal according to local regulations is recommended at the end of the product's lifecycle.
