LS071I01-S-V1: 0.71-Inch a-Si TFT LCD Module, 160×160 Resolution, 4-line SPI Interface, 12-Pin, IPS Display, Transmissive, 262k Colors
Product Subtitle / Keywords
0.71 Inch Display, 160(RGB)×160 Resolution, Active Matrix a-Si TFT-LCD Module, IPS (In-Plane Switching) Viewing Direction (Free), 4-line Serial Interface (SPI), 12-Pin Connector, COG+FPC+B/L, Display Colors 262k, Transmissive Type, Display Mode: Active matrix TFT, Drive IC: GC9D01N, Backlight: 1 Chip-White LED, IF=20mA, Vf=3V(TYP), Operating Temp: -20°C~70°C, Storage Temp: -30°C~80°C, Contrast Ratio: 800 Typ, Response Time: 30 ms Typ, Viewing Angle: 85/85/85/85 Deg (Typ), Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS071I01-S-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 0.71-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module.
This product specification (Revision 1.0, dated 2025-11-25) serves as the definitive technical document, defining its general description (including a 160(RGB)*160 resolution and 262k color display), physical features (IPS viewing direction, 4-line serial interface), outline dimensions, absolute maximum ratings, electrical characteristics, pin assignments for the 12-pin connector, and electro-optical characteristics.
The document provides the core parameters necessary for system integration into compact embedded display applications requiring a small, high-resolution display with an SPI interface and wide viewing angles. 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) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit.
- Display Type: Active matrix TFT, Transmissive type.
- Display Format: Graphic 160(RGB) × 160 pixel array.
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Interface Type: 4-line Serial Interface (SPI).
- Drive IC: GC9D01N (Main LCD Driver).
- Pin Count: 12-pin connector.
- Backlight: 1 Chip-White LED, IF=20mA, Vf=3V (TYP).
- Display Colors: Up to 262k colors.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Module Model | LS071I01-S-V1 |
| LCD Size (Diagonal) | 0.71 inch |
| Resolution | 160(RGB) × 160 pixels |
| Display Type | Transmissive a-Si TFT-LCD |
| Display Mode | Active matrix TFT, Transmissive type |
| Viewing Direction (Grayscale Inversion) | Free (IPS) |
| Input Data | 4-line serial interface (SPI) |
| Drive IC | GC9D01N |
| Module Type | COG+FPC+B/L |
| Backlight Type | 1 Chip-White LED |
| Display Colors | Up to 262k colors |
| PIN Count | 12 |
| Operating Temperature | -20°C ~ +70°C |
| Storage Temperature | -30°C ~ +80°C |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Dispaly Technology Co.,Ltd) |
| Document Revision / Date | Revision 1.0 / 2025-11-25 |
3.2 Electrical & Interface Specifications
3.2.1 Pin Description (12-pin Connector - SPI Interface)
The module uses a 12-pin interface with a 4-line serial interface (SPI) configuration for the GC9D01N controller.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | GND | Ground | |
| 2 | LEDK | Power for LED backlight cathode | |
| 3 | LEDA | Power for LED backlight anode | |
| 4 | VDD | Power supply | |
| 5 | GND | Ground | |
| 6 | GND | Ground | |
| 7 | D/C | Command and Data select pin | |
| 8 | CS | Chip select pin | |
| 9 | SCL | Serial clock pin | |
| 10 | SDA | Serial data input/output bidirection pin | |
| 11 | RESET | Reset signal pin | |
| 12 | GND | Ground |
3.2.2 Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.
| Item | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V |
| Supply voltage | IOVCC | -0.3 | 4.6 | V |
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.3 Backlight & Drive Conditions
The module uses a 1 Chip-White LED backlight.
| Item | Condition | Value | Unit |
|---|---|---|---|
| Forward Current (IF) | For LED backlight | 20 | mA |
| Forward Voltage (Vf) | TYP | 3 | V |
3.2.4 Interface Timing Characteristics
4-line Serial Interface (SPI) Timing:
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Clock rise/fall time | tr / tf | ≤ 15 | ns |
| Input level high (70%) | VIH | 70% of VDD | V |
| Input level low (30%) | VIL | 30% of VDD | V |
Note: Ta = 25 °C, VDDI=1.65V to 3.3V, VDDB=2.5V to 3.3V, AGND=VSS=0V.
3.3 Electro-Optical Characteristics
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr + Tf | θx = θy =0 | --- | 30 | 40 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy =0 | --- | 800 | --- | - | Note 2 |
| Transmittance | T% | θx = θy =0 | 3.0 | 3.6 | --- | % | Note 3 |
| Color Chromaticity (White) | W x | θx = θy =0 | --- | 0.301 | --- | --- | - |
| Color Chromaticity (White) | W y | θx = θy =0 | --- | 0.333 | --- | --- | - |
| Viewing angle (Top: θT) | θT | CR > 10 | --- | 85 | --- | Deg. | Note 3 |
| Viewing angle (Bottom: θB) | θB | CR > 10 | --- | 85 | --- | Deg. | Note 3 |
| Viewing angle (Left: θL) | θL | CR > 10 | --- | 85 | --- | Deg. | Note 3 |
| Viewing angle (Right: θR) | θR | CR > 10 | --- | 85 | --- | Deg. | Note 3 |
Notes:
- Note 2: Contrast measurements shall be made at viewing angle of θ=0° and at the center of the LCD surface. Luminance Contrast Ratio (CR) is defined mathematically and the Contrast Ratio is greatly affected by the accuracy of the polarizer attached.
- Note 3: Transmittance is the Value with Polarizer (HC+Clear) & silicate BLU (Film structure is on Table 6).
4. Application Guidelines & Critical Notes
Intended Use
- Compact embedded display applications requiring a small form factor with high resolution and wide viewing angles.
- Wearable devices (smartwatches, fitness trackers), smart home devices, and small portable instruments.
- Any application requiring a standard 0.71-inch display with an SPI interface and IPS technology.
Critical Design Considerations
- IPS Technology: This module features IPS (In-Plane Switching) with "Free" viewing direction (Grayscale Inversion), providing excellent wide viewing angles (85° Typ in all directions) and color consistency.
- Power Supply (VDD): The module requires a logic power supply VDD with a range of 1.65V to 3.3V for VDDI and 2.5V to 3.3V for VDDB (based on Note from section 7-2).
- Backlight Driving: The backlight uses a 1 Chip-White LED requiring a forward current of IF = 20mA and forward voltage of Vf = 3V (TYP). A simple resistor-limited drive circuit can be used.
- Interface (4-line SPI): The module uses a 4-line serial interface (SPI) with dedicated D/C (data/command), CS (chip select), SCL (clock), and SDA (data) lines. The host controller must generate the correct SPI protocol for the GC9D01N driver IC. Clock rise/fall time should be ≤ 15ns.
- Reset (RESET): The module has a dedicated hardware reset pin (RESET, Pin 11). Ensure a proper reset pulse is provided during power-up to initialize the driver IC correctly.
- Temperature Limits: Operating Temperature: -20°C to +70°C. Storage Temperature: -30°C to +80°C.
- Mechanical Integration (Notes from Outline Dimension):
- Housing foam should be opened at least 0.6mm larger than VAmds on each side.
- It is recommended that the housing visible area should be at least 0.3mm smaller than VAmds on each side.
- TP edge must not contact metal conductors.
Handling & Compliance
- The module is ROHS Compliant.
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass and FPC – handle with care.
- Avoid bending the FPC sharply, especially near the connector interface.
- Do not attempt to disassemble or process the LCD Module.
- NC terminals should be open. Do not connect anything.
- If the logic circuit power is off, do not apply the input signals.
5. Conclusion & Design-In Support
The LS071I01-S-V1 specification details a compact 0.71-inch TFT display module with a high resolution (160×160), 4-line SPI interface, GC9D01N driver IC, IPS technology for wide viewing angles, and vivid 262k color support — an excellent choice for applications requiring a small, high-quality display.
Key Strengths
- Compact 0.71-inch Size: Fits in space-constrained wearable and portable applications.
- Relatively High Resolution (160×160): Provides sharp image quality for its small size.
- IPS Technology: Excellent 85° viewing angle in all directions with "Free" direction for grayscale inversion.
- Simple 4-line SPI Interface: Easy to drive with most microcontrollers.
- 262k Color Support: Offers vibrant color display capability.
- High Contrast Ratio (800 Typ): Provides good image clarity.
- Recent Specification (2025-11-25): Modern, up-to-date product design.
Main Design Focus
- The critical design task is programming the GC9D01N driver IC via the 4-line SPI interface and providing the correct logic power supply voltage (1.65V to 3.3V).
- Supporting requirements: Design a simple backlight drive circuit (IF=20mA, Vf=3V). Provide a proper RESET signal during power-up. Ensure the SPI timing (clock rise/fall ≤ 15ns) meets the specifications. Follow the mechanical integration notes for housing design (foam opening and visible area recommendations).
This module is an excellent choice for small, high-resolution display applications requiring an SPI interface, IPS viewing angles, and compact size.
