LS014I02-MP-V1 (ST77916): 1.4-inch TFT LCD Module, 320×320, MIPI Interface, 16.7M Colors, Transmissive IPS

LS014I02-MP-V1 (ST77916): 1.4-inch TFT LCD Module, 320×320, MIPI Interface, 16.7M Colors, Transmissive IPS

Product Subtitle / Keywords

1.4 Inch Display, 320(RGB)×320 Resolution, Transmissive a-Si TFT-LCD Module, COG+FPC+B/L Module Type, MIPI Interface (1 Lane DSI), 16.7M Colors (24-bit), Main LCD Driver: ST77916, IPS Display Mode, Module Outline: 27.4(W) × 30.23(H) × 2.1(D) mm (Approx.), Active Area: 25.2(W) × 25.2(H) mm, Operating Temp: -20°C ~ +70°C, Storage Temp: -30°C ~ +80°C, Backlight: 3 Chip-White LED (Parallel), Vf=3.0V (Typ.), If=60mA, Viewing Direction: IPS (ALL), Display Mode: Normally Black, RoHS Compliant, Product Revision 1.0 (New Released on 2026-06-02)

1. Executive Summary And Product Positioning

The LS014I02-MP-V1 is a 1.4-inch diagonal 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 comprehensive module is a complete, ready-to-use visual interface solution, integrating a TFT-LCD panel, a driver circuit, and a backlight unit (B/L) into a compact and robust package. The product specification (Revision 1.0, new released on 2026-06-02) serves as the definitive technical document for this module.

This module is characterized by its high-resolution display in a compact 1.4-inch form factor. It features a resolution of 320(RGB)×320 pixels and is capable of displaying up to 16.7M colors, which corresponds to 24-bit color depth (8-bit per primary color Red, Green, Blue). This ensures smooth color gradients and detailed imagery suitable for advanced graphical user interfaces. The square aspect ratio is ideal for applications like smartwatches and circular display emulation.

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. The manufacturer has provided key recommendations for mechanical integration, including VA area clearance and TP placement.

2. Detailed Product Overview And Architecture

The LS014I02-MP-V1 is engineered for devices that demand a clear, vibrant square display in a very compact package, such as smartwatches, wearable devices, and compact IoT terminals. Its architecture is built around several key technologies and design choices:

• Core Technology: Transmissive type a-Si TFT-LCD with IPS (In-Plane Switching) display mode. This technology offers superior color reproduction and wide viewing angles (specified as "ALL" direction). As a transmissive display, it requires a backlight to be visible. The display mode is Normally Black.
• Module Type: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight). The driver IC (ST77916) is directly mounted onto the LCD glass (COG), minimizing size and interconnect complexity. The FPC provides a flexible connection to the host system. The module outline dimensions are approximately 27.4(W) × 30.23(H) × 2.1(D) mm.
• Display Format: Graphic 320(RGB)×320 Dot-matrix. This is a unique square resolution, offering a 1:1 aspect ratio, which is perfectly suited for smartwatch faces and other square or circular displays that use a square pixel matrix. The RGB stripe arrangement provides full color mixing for each pixel.
• Display Characteristics: Capable of displaying up to 16.7M colors. This refers to 8-bit color depth per primary color (R, G, B), allowing the module to generate 16,777,216 distinct colors for the most realistic and smooth color reproduction.
• Interface Type: The module utilizes a MIPI-DSI (Mobile Industry Processor Interface - Display Serial Interface) for high-speed data transfer. The interface uses differential data and clock lines (D0P/D0N and CLKP/CLKN), which is standard for modern application processors. The module uses a MIPI 1-LANE configuration.
• Main LCD Driver IC: The module integrates the ST77916 driver IC. This specific IC is designed to drive the TFT matrix, generate the necessary supply voltages (including VCOM), and handle the MIPI interface commands.
• Backlight Unit: The module utilizes a white LED backlight comprised of 3 chips connected in parallel. The specified driving condition is IF=60mA and Vf=3.0V (Typ.). The backlight circuit is shown on the specification, with LEDA (Anode) and LEDK (Cathode) pins on the FPC connector.
• Special Features: Very high resolution 16.7M color capability (8-bit), IPS technology for wide viewing angles (ALL), compact size (1.4 inch), MIPI 1-Lane interface for standard integration, square resolution (320×320), silver dot and yellow insulation paper on FPC for ESD protection, and compliant with the RoHS directive. The module includes a white alignment mark for mechanical positioning and silver adhesive points for grounding.
• Manufacturer's Mechanical Recommendations: The specification provides several key recommendations: 1) The case visual area should be smaller than the VAA (Viewing Area) by more than 0.3mm per side. 2) The foam opening for the case should be larger than the VAA by more than 0.6mm per side. 3) The TP edge should not contact any metal conductor.
• Approval Status: Approved Product Specification only (Revision 1.0).

3. Exhaustive Technical Specifications

3.1 General & Mechanical Specification

This section provides the physical dimensions and other key general parameters of the module. The module is extremely compact and features a square active area.

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. These ratings are referenced to GND=0V.

3.3 Electrical Characteristics

These are the recommended operating conditions for the module. The module requires two power supplies: VCC for the analog circuit and IOVCC for the logic interface.

3.4 Backlight Driving Conditions

The module uses a white LED backlight composed of 3 chips configured in parallel. The driving condition is: IF=60mA, Vf=3.0V (TYP). A constant current source is recommended for driving the backlight to ensure consistent brightness and longevity.

3.5 Interface Connection (15-Pin FPC)

The module uses a 15-pin FPC connector. The interface includes power (VDD, IOVCC, GND), MIPI data and clock lanes (D0P/D0N, CLKP/CLKN), control signals (RESET), and backlight power (LEDA, LEDK).

3.6 MIPI Bus Turnaround & Reset Timing

The MIPI interface follows standard timing parameters. The Reset timing requires the RESET pin to be held low for a minimum of 10µs (TRESETL). The Bus Turnaround Procedure defines the timing for LP and HS modes, with specific timings for TLPX, TTA-SURE, TTA-GET, and TTA-GO.

4. Application Scenario

The LS014I02-MP-V1 is a high-performance, compact display module ideal for any embedded system that requires a vibrant, high-resolution square display. Its 1.4-inch diagonal size with a 320×320 resolution provides an incredibly sharp and detailed image for rich graphical content and text, particularly for watch faces and circular interfaces. The 16.7M color capability allows for the most realistic and visually appealing user interface possible with an LCD.

Key application areas are numerous and diverse:

• Smartwatches & Wearables: The primary application. The square 320x320 resolution is perfect for watch faces, notifications, and fitness tracking data.
• Circular Display Emulation: The high-resolution square panel with IPS technology is excellent for emulating circular displays with a round bezel, providing a premium look.
• Medical Wearables: Compact health monitors, patient monitoring devices, and drug infusion pumps benefit from the high resolution and wide viewing angles.
• IoT Edge Terminals: Small, compact IoT devices that require a crisp, clear local display for status, data logging, or menu navigation.
• Smart Home Devices: Compact smart switches, thermostats, and control panels that require a premium visual interface in a small form factor.

The module's MIPI 1-Lane interface is standard for modern microcontrollers and application processors, simplifying integration. The IPS technology ensures excellent image consistency when viewed from any angle. The manufacturer's specific mechanical recommendations (VA clearance, foam opening, TP isolation) are critical for successful mechanical design integration.

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. The module includes a silver conductive paste dot (银浆点) and a yellow insulation protective film (黄色绝缘胶纸) on the FPC for ESD protection and structural reinforcement, which should be preserved during handling.

The FPC is delicate; avoid sharp bends at the connector interface. A stiffener (补强 T=0.2mm) is applied to the FPC for additional support at the connector. Do not operate or store the module outside the specified environmental conditions. The operating temperature range is -20°C to +70°C, and the storage temperature range is -30°C to +80°C.

Critical Power-On Sequence: Ensure the RESET signal is held low for at least 10µs after power is stable before releasing it to ensure proper initialization of the driver IC. The MIPI bus turnaround procedure must be correctly implemented for data lane and clock lane operation. Do not keep the interface signal high impedance when power is on.

The module should be stored in a clean, dry environment away from direct sunlight, high temperatures, and corrosive gases. It is strongly recommended to read the full specification document (LS014I02-MP-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.