Product Subtitle / Keywords:
2.1 Inch Display, 480(RGB)×480 Resolution, Transmissive a-Si TFT-LCD, 3SPI+18RGB Interface, COG+FPC+B/L, 262K Colors, ST7701S Driver, 58.18×59.71×2.3 mm, 80mA Backlight, 3.0V Backlight Voltage, ALL Viewing Direction, -20°C~70°C Operating Temperature

1. Executive Summary & Product Positioning

The LS0201I06-R-V1, developed by Lixin (Wan'an) Intelligent Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 2.1-inch transmissive amorphous Silicon TFT-LCD (a-Si TFT-LCD) module.

This product specification (Revision 1.0, Module Type: COG+FPC+B/L) serves as the definitive technical document, defining its structural composition (COG+FPC+B/L), physical features, mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, complete 3SPI+18RGB interface pinout and timing, and comprehensive electro-optical performance. It delivers a resolution of 480(RGB)×480 with 262K-color display capability, driven by the ST7701S controller.

The document provides the core parameters necessary for system integration into compact embedded display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications, interface timing, and mechanical tolerances 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).
• Display Mode: Active matrix TFT, Transmissive type, Normally Black.
• Display Format: Graphic 480(RGB)×480 Dot-matrix.
• Display Characteristics: Capable of displaying up to 262 thousand colors.
• Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit). Composed of a TFT-LCD panel, a driver circuit, and a backlight unit.
• Input Data: 3SPI+18RGB.
• Viewing Direction (Grayscale Inversion): ALL.
• Drive IC: ST7701S.
• Approval Status: ☑ Approved Product Specification only (as per signature block).

3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

Critical Mechanical Design Notes (from outline dimension drawing):

1. Display Type: TFT/Transmissive.
2. Viewing Direction: ALL.
3. Storage Temperature: -30°C ~ +80°C.
4. Operating Temperature: -20°C ~ +70°C.
5. General Tolerance: ±0.20 mm.
6. Drive IC: ST7701S.
7. LCD Driver Voltage: 2.8±0.3V.
8. Color: White.
9. Backlight Circuit: IF=80mA, VF=3.0V (TYP).
10. LED Circuit: 4Parallel.
11. ROHS Compliance: Yes.
12. Connector Type: 0.5 PITCH 40PIN.
13. FPC Bend: The FPC is shipped in a specific bent configuration (FPC弯折出货).
14. PI Reinforcement: Included on the FPC.
15. Silver Paste Points: Present on the module.
16. Yellow Insulation Paper: Included for handling during assembly.

3.2 Electrical & Interface Specifications

3.2.1 Absolute Maximum Ratings

Notes (interpreted):

• Note1/Note2: Stress beyond these ratings may cause permanent damage; functional operation is not implied under these conditions.

3.2.2 Electrical Characteristics (DC – Recommended Operating Conditions)

A. LCM Electrical Characteristics:

B. Backlight Characteristics:

3.2.3 Pin Description (40-pin FPC)

Interface Summary:

• 3SPI+18RGB Interface: Uses SCK (Serial Clock), CS (Chip Select), RESET (Reset) for SPI control, and PCLK (Pixel Clock), DE (Data Enable), VSYNC (Vertical Sync), HSYNC (Horizontal Sync), and DB0~DB17 (18-bit RGB Data Bus) for RGB data transmission.
• Backlight: Dedicated LEDA (Anode) and LEDK (Cathode) pins.
• Power: VDD (2.8V) for main logic, IOVCC (1.8V) for I/O interface, GND for ground.
• Touch Panel Interface: Pins 35-40 provide a dedicated interface for an external capacitive touch panel (TP_INT, TP_SDA, TP_SCL, TP_RESE, TP_VC).

3.2.4 Backlight Unit

Backlight Circuit Diagram (from document):

LEDA → [Backlight Circuit] → LEDK
IF = 80mA
VF = 3.0V (TYP)

3.3 Optical & Electro-Optical Characteristics

(Not explicitly provided in the extracted document excerpt; refer to Section 6 of the full specification.)

3.4 Version Record

4. Application Guidelines & Critical Notes

Intended Use

• Smart home control panels
• IoT display nodes
• Miniature handheld instruments
• Any application requiring a compact, square display with RGB interface

Critical Design Considerations

1. Interface (3SPI+18RGB): This module uses a 3SPI+18RGB interface for communication. The host MCU must have:

   • 3 SPI pins (SCK, CS, RESET) for command/register configuration.
   • 18 RGB data pins (DB0~DB17) for pixel data.
   • 4 control pins (PCLK, DE, VSYNC, HSYNC) for RGB timing.

2. Power Supply:

   • Provide stable VDD (2.5V to 3.3V, 2.8V typical) for the main logic.
   • Provide stable IOVCC (1.65V to 3.3V, 1.8V typical) for the I/O interface.
   • The backlight requires a constant-current LED driver set to 80 mA at approximately 3.0V (TYP).

3. Touch Panel Interface:

   • The module includes a dedicated TP interface (Pins 35-40) for an external capacitive touch panel.
   • The TP interface uses: TP_SCL (I²C clock), TP_SDA (I²C data), TP_RESE (Reset), TP_INT (Interrupt), and TP_VC (Power).
   • Ensure the touch panel controller is properly initialized via its I²C interface.

4. Mechanical Integration:

   • Module Outline: 58.18mm (H) × 59.71mm (V) × 2.3mm (D).
   • Active Area: 53.28mm × 53.28mm – a perfectly square display.
   • FPC: The module uses a 40-pin FPC with 0.5mm pitch.
   • Connector Type: 0.5 PITCH 40PIN.
   • FPC Bend: The FPC has a designated bend area — follow the intended bend direction for installation.

5. Viewing Angle Characteristics:
   This module provides ALL viewing direction, ensuring consistent image quality from all angles.

6. Temperature Limits:

   • Operating Temperature: -20°C to +70°C.
   • Storage Temperature: -30°C to +80°C.

Handling & Compliance

• The module is ROHS compliant.
• Observe standard ESD precautions during handling and assembly.
• The module contains fragile glass and a 40-pin FPC – handle with care.
• Avoid bending the FPC sharply, especially near the connector interface.
• The module has a total thickness of 2.3mm – be careful when handling to avoid flexing.

5. Conclusion & Design-In Support

The LS0201I06-R-V1 specification details a compact 2.1-inch square display module with a 3SPI+18RGB interface and ST7701S driver — an excellent choice for applications requiring a square display format with RGB interface for high-speed data transfer.

Key Strengths:

1. Square Display Format: The 480×480 resolution in a 2.1-inch square format is ideal for symmetrical UI designs.

2. High-Speed RGB Interface: The 18-bit RGB interface provides excellent throughput for smooth animations and fast screen updates.

3. Integrated Touch Panel Interface: The dedicated TP interface (Pins 35-40) simplifies integration with external capacitive touch panels.

4. Standard 40-pin FPC: The 0.5mm pitch 40-pin FPC is a standard interface for many embedded systems.

5. Wide Operating Temperature Range: -20°C to +70°C for operation and -30°C to +80°C for storage.

Main Design Focus:

• The critical design task is properly implementing the 3SPI+18RGB interface with the correct timing for PCLK, DE, VSYNC, and HSYNC signals.
• Supporting requirements:
  • Provide stable VDD (2.8V typical) and IOVCC (1.8V typical) power.
  • Provide a constant-current backlight driver set to 80 mA at 3.0V (TYP).
  • Mechanical integration — the module outline is 58.18mm × 59.71mm × 2.3mm.
  • FPC connector — verify the 40-pin FPC with 0.5mm pitch.
  • Touch panel integration — connect and initialize the external touch panel via the dedicated TP interface.

This module is an excellent choice for designs requiring a square display with RGB interface and integrated touch panel support, such as smart home control panels, IoT devices, and miniature instruments.