LS0154I02-S-V1: 1.54-inch TFT LCD Module, 240×240, 262K Colors, Transmissive, COG+FPC+B/L
Product Subtitle / Keywords
1.54 Inch Display, 240(RGB)×240 Resolution, Transmissive a-Si TFT-LCD Module, COG+FPC+B/L Module Type, 262K Colors, Panel Size: 1.54 inch, Module Type: COG+FPC+B/L, Operating Temp: -20°C ~ 70°C, Storage Temp: -30°C ~ 80°C, RoHS Compliant
1. Executive Summary And Product Positioning
The LS0154I02-S-V1 is a 1.54-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module, produced by 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd).
This product specification (Revision 1.0) serves as the definitive technical document. It is composed of a TFT-LCD panel, a driver circuit, and a backlight unit. 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.
2. Detailed Product Overview And Architecture
- Core Technology: Transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module. The technology leverages amorphous silicon to create a thin film transistor layer that actively controls each pixel, allowing for high-resolution and responsive image display.
- Module Type: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight). This construction is typical for compact LCD modules, where the driver IC is directly mounted onto the glass substrate (COG) to save space, connected via a flexible printed circuit (FPC) for signal routing, and illuminated by a backlight unit (B/L) to make the display visible.
- Display Format: Graphic 240(RGB) × 240 pixel array. The dot arrangement is 240RGB(H)*240(V) Dots, meaning there are 240 horizontal groups of Red, Green, and Blue sub-pixels and 240 vertical rows, providing a square display area.
- Display Characteristics: Capable of displaying up to 262k colors, which corresponds to a 6-bit color depth per channel (2^6 * 2^6 * 2^6 = 262,144 colors). This allows for smooth color gradients and vibrant image reproduction suitable for graphical user interfaces.
- Interface Type: While not explicitly detailed in the general description, the module is designed for integration with a host system via its FPC connector. Engineers should refer to the interface specification section of the document for pin assignments and signal timing.
- Backlight Unit: The module includes a backlight unit, which is essential for making the transmissive LCD visible. Further details on the backlight’s electrical characteristics (voltage, current) are provided in the detailed specifications.
- Special Features: High resolution for its size (1.54-inch), capable of displaying up to 262K colors, robust construction suitable for various embedded applications, and compliant with RoHS (Restriction of Hazardous Substances) directive, ensuring environmental safety.
- Approval Status: Approved Product Specification only (Revision 1.0). The customer has approved the product specification without yet requiring samples, indicating initial design-in phase.
3. Exhaustive Technical Specifications
3.1 General Description & Physical Features
The physical features section of the datasheet provides critical dimensions and mechanical properties 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 positions it in the small-to-medium display category, ideal for applications like smartwatches, medical handhelds, or IoT control panels. The module’s thickness is determined by the combined thickness of the TFT glass, driver IC (on-glass), FPC, and backlight assembly. Customers must ensure their enclosure accommodates these dimensions with proper clearance.
3.2 Absolute Maximum Ratings
| 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 |
Note1: These values are absolute maximum ratings. Exceeding these values may cause permanent damage to the device. Functional operation should be restricted to the conditions described under Recommended Operating Conditions.
Note2: All voltages are referenced to GND (Ground). Improper power sequencing can also lead to latch-up or damage. A stable power supply with low ripple is essential.
3.3 Electrical Characteristics
The electrical characteristics define the conditions under which the module will operate reliably. The recommended operating ranges are narrower than the absolute maximum ratings, providing a safe window for design.
| Item | Symbol | Min | Typ | Max | Unit | Application Information |
|---|---|---|---|---|---|---|
| Supply voltage (Main) | VCC | 2.4 | 2.75 | 3.3 | V | This is the main power supply for the TFT-LCD panel and driver IC core. A 2.8V or 3.0V LDO is typically used. |
| Supply voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V | This powers the logic I/O interface. 1.8V is typical for modern microcontrollers; ensure voltage level compatibility with the host processor. |
| Input Voltage (L level) | VIL | 0 | - | 0.3*IOVCC | V | To be recognized as a logic-low signal, the input voltage must be below this threshold. |
| Input Voltage (H level) | VIH | 0.7*IOVCC | - | IOVCC | V | To be recognized as a logic-high signal, the input voltage must be above this threshold. |
3.4 Optical Characteristics
Optical characteristics define the visual performance of the module, such as contrast, brightness, viewing angle, and response time. These are typically measured under specific laboratory conditions (e.g., Ta=25°C, darkroom) and may vary slightly in real-world applications. The transmissive type ensures best contrast under bright backlight conditions, making it suitable for indoor applications with controlled ambient light.
4. Application Scenario
The LS0154I02-S-V1 is a compact, high-resolution display module, making it ideal for a wide range of embedded and portable systems. Its 1.54-inch diagonal size and 240x240 resolution provide a good balance between display area and visual clarity for character-based and simple graphical interfaces. The 262K color capability allows for rich graphical content and icons.
Key application areas include:
- Smart Wearables: Such as smartwatches and fitness bands, where a small, low-power display is essential.
- Handheld Instruments: Like multimeters, spectrum analyzers, and medical monitors that require a clear display for data readouts.
- Industrial Control Panels: Human-Machine Interfaces for compact machinery or IoT controllers.
- Medical Devices: Patient monitoring equipment, portable diagnostic tools, and drug delivery systems.
- Consumer Electronics: Remote controls, set-top boxes, and smart home devices.
The module's COG+FPC+B/L construction makes it easy to integrate into a host device via the flexible printed circuit, simplifying the mechanical and electrical design process. Developers should ensure their application's operating temperature falls within the -20°C to 70°C range.
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. ESD (Electrostatic Discharge) protection is mandatory throughout handling and assembly.
The module should be stored in a clean, dry environment away from direct sunlight and corrosive gases. It is strongly recommended to read the full specification document (LS0154I02-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 or modification.
The product is compliant with the RoHS (Restriction of Hazardous Substances) directive, which restricts the use of certain hazardous materials such as lead, mercury, and cadmium in electrical and electronic equipment, ensuring environmental compliance and safety. Proper waste disposal according to local regulations is recommended at the end of the product's lifecycle.
