LESSON Smart Display LSC040I01-R-V1 (Driver IC: ST7701SN) – 3.95" 480×480 Square IPS TFT Module for Wearables & Compact HMIs

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Tags & Keywords
#TFT-LCD #RGBInterface #3.95inch #480x480 #SquareDisplay #16.7MColors #IPS #WearableDevice #CompactHMI #RoHS #LESSON #SmartDisplay

Introduction
This document is the official product specification for the LSC040I01-R-V1, a 3.95-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring a unique square resolution of 480(RGB)×480, 16.7 million colors, an IPS panel, and a parallel RGB interface, this module is designed for applications requiring a compact, square display format. It is ideally suited for wearable devices (smartwatches, fitness trackers), compact industrial human-machine interfaces (HMIs), portable instrumentation, and specialized consumer electronics where a symmetrical, high-quality display is essential.

Key Specifications

  • Brand & Model: LESSON Smart Display LSC040I01-R-V1
  • Screen Size: 3.95 inches (diagonal)
  • Active Area: 71.86 (H) × 70.18 (V) mm
  • Driver IC: ST7701SN
  • Display Technology: Transmissive type a-Si TFT-LCD
  • Display Mode: Normally Black, IPS
  • Module Type: COG + FPC + B/L + CTP
  • Display Resolution: 480(RGB) × 480 pixels
  • Display Colors: Up to 16.7 Million Colors
  • Interface: Parallel RGB (inferred from pin description: DB0-DB17, DCLK, HS, VS, DE)
  • Module Outline Dimensions: 84.0 (H) × 84.0 (V) × 3.03 (D) mm
  • Operating Temperature: -20°C to +70°C
  • Storage Temperature: -30°C to +80°C
  • Backlight: 10 white LEDs (5 series, 2 parallel), IF=40mA (20mA/LED), VF=15~16V
  • Optical Characteristics (Typical):
    • Response Time (Tr+Tf): 30 ms
    • Contrast Ratio (CR): 1200:1
    • Viewing Angle (CR>10): 85° (All directions: T, B, L, R)
    • White Chromaticity (CIE1931): Wx=0.302, Wy=0.337
  • Environmental Compliance: RoHS Compliant

General Description
The LSC040I01-R-V1 is a distinctive square-format display module powered by the ST7701SN driver IC. Its 1:1 aspect ratio makes it perfect for applications where information is presented symmetrically or where a circular bezel is used. The module combines an IPS panel for excellent viewing angles with a traditional 18-bit parallel RGB interface (using DB0-DB17), ensuring compatibility with many microcontrollers. The specification provides complete mechanical drawings, detailed electrical characteristics (VCC, IOVCC levels), a full pinout, RGB timing parameters, and comprehensive electro-optical data. It also includes critical design notes for mechanical integration, such as bezel clearance requirements for the touch panel.

Key Features

  • Square IPS Display: Unique 1:1 aspect ratio with wide viewing angles.
  • ST7701SN Driver: Common driver for reliable performance.
  • Parallel RGB Interface: Easy to interface with embedded controllers.
  • Detailed Mechanical & Optical Specs: Enables precise integration and visual quality assessment.
  • Integrated Touch Ready: Module type includes CTP (Capacitive Touch Panel).

Application Scenarios

  • Wearable Devices: High-end smartwatches, fitness tracker main displays.
  • Compact Industrial HMIs: Handheld controller interfaces, portable device status screens.
  • Portable Instrumentation: Multimeters, environmental monitors.
  • Consumer Electronics: Smart home controllers, retro gaming devices.
  • Specialized Medical Devices: Portable diagnostic equipment displays.

Conclusion
The LESSON Smart Display LSC040I01-R-V1 fills a niche for high-quality square displays. Its comprehensive specification and standard interfaces make it a compelling choice for designers of wearable tech and compact embedded systems seeking a premium, symmetrical visual interface.