LSC016I02-QS-V1 1.6 inch TFT-LCD Module 400x400 16.7M Colors IPS
1. Executive Summary & Product Positioning
The LSC016I02-QS-V1 is a 1.6-inch transmissive type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module developed by 立信(万安)智显科技有限公司 (Lesson Smart Display Technology Co., Ltd). It is composed of a TFT-LCD panel, a driver circuit, and a backlight unit. The panel size is 1.6 inch and the resolution is 400(RGB)*400, the panel can display up to 16.7M colors.
Product Positioning: This module features a square 1.6-inch IPS (In-Plane Switching) panel, offering superior viewing angles (Free/Grayscale Inversion Free) and a high typical luminance of 400 cd/m². With a high-speed QSPI interface, it is well-suited for a wide range of applications such as smart wearables, compact instruments, and any embedded system requiring a high-resolution, high-brightness, and compact square display.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 1.6-inch diagonal, a-Si TFT active matrix, transmissive, IPS mode. Resolution is 400(RGB) × 400 pixels with an active area of 39.84 (H) × 39.84 (V) mm.
- Driver IC: The module uses the ST77903 driver IC, communicating via a QSPI (Quad SPI) Interface.
- Backlight Unit (B/L): A white LED backlight with 4 Chip-White LEDs configured in parallel. The typical driving condition is IF=60mA, Vf=2.8~3.3V.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The module outline dimensions are 44.00 (H) × 44.00 (V) × 2.68 (D) mm.
- Interface: The module communicates via a 24-pin FPC connector. The display interface is QSPI (Quad Serial Peripheral Interface).
- Display Mode: Transmissive, IPS, Normally Black.
- Viewing Direction (Grayscale Inversion): Free (IPS).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 1.6 inches |
| Resolution (Dots) | 400(RGB) × 400 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, IPS |
| Module Construction | COG+FPC+B/L |
| Color Depth | 16.7M Colors |
| Viewing Direction (Grayscale Inversion) | Free (IPS) |
| Input Data Interface | QSPI |
| Driver IC | ST77903 |
| Module Size (H×V×D) | 44.00 × 44.00 × 2.68 mm |
| Active Area (AA, H×V) | 39.84 × 39.84 mm |
| Pixel Arrangement | RGB Stripe (400(RGB)×400) |
| Display Mode | Active matrix TFT, Transmissive, Normally Black |
| Backlight Type | 4 Chip-White LED, Parallel |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage (VCC) | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage (IOVCC) | IOVCC | -0.3 | 4.6 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
3.3 Electrical Characteristics
3.3.1 Recommended Operating Conditions
Condition: VDDI=1.65 to 3.3V, VDD=2.6 to 3.3V, AGND=DGND=0V, Ta=25°C.
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.6 | 2.8 | 3.3 | V |
| I/O supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input voltage (L level) | VIL | VSS | --- | 0.3*IOVCC | V |
| Input voltage (H level) | VIH | 0.7*IOVCC | --- | IOVCC | V |
3.3.2 Backlight LED Characteristics
The backlight consists of 4 Chip-White LEDs in Parallel. The backlight drive condition is IF=60mA, Vf=2.8~3.3V (TYP).
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | Vf | 2.8 ~ 3.3 | V |
| Forward Current | If | 60 | mA |
3.4 Interface Pin Assignment (24-Pin FPC)
Connector: 24-pin FPC. Interface: QSPI (Quad SPI).
Note: Pins 19-24 are dedicated to an integrated Capacitive Touch Panel (TP) interface. If the TP is not used, these pins can be left as NC.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | CS | I | Chip select pin. Low Enable. |
| 2 | DA0 | I | QSPI Data pin (bit 0). |
| 3 | DA1 | I | QSPI Data pin (bit 1). |
| 4 | SCL | I | The serial input/output clock in serial interface mode. |
| 5 | DA3 | I | QSPI Data pin (bit 3). |
| 6 | DA2 | I | QSPI Data pin (bit 2). |
| 7 | NC | -- | No connection. |
| 8 | NC | -- | No connection. |
| 9 | RESET | I | This signal will reset the device and it must be applied to properly initialize the chip. |
| 10 | NC | -- | No connection. |
| 11 | NC | -- | No connection. |
| 12 | GND | P | Ground. |
| 13 | TE | O | Tearing effect output. |
| 14 | IOVCC | P | Power supply (I/O). |
| 15 | VCI | P | Power supply (Core). |
| 16 | LEDK | P | Power for LED backlight cathode. |
| 17 | LEDA | P | Power for LED backlight anode. |
| 18 | GND | P | Ground. |
| 19 | TP_SCL | I | SCL pin for Touch Panel. |
| 20 | TP_SDA | I/O | SDA pin for Touch Panel. |
| 21 | TP_RST | I | Reset Pin for Touch Panel. |
| 22 | TP_INT | I | Interrupt signal for Touch Panel. |
| 23 | TP_VDD | P | Power supply for Touch Panel. |
| 24 | TP_GND | P | Ground for Touch Panel. |
3.5 Timing Characteristics
3.5.1 QSPI Interface Characteristics
Test conditions: VDDI=1.65 to 3.3V, VDD=2.4 to 3.3V, AGND=DGND=0V, Ta=25°C.
| Signal | Symbol | Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|---|---|
| CSX | TCS | Chip select setup time (write) | 19 | -- | ns | - |
| CSX | TCSH | Chip select hold time (write) | 19 | -- | ns | - |
| CSX | TCSS | Chip select setup time (read) | 60 | -- | ns | - |
| CSX | TSCC | Chip select hold time (read) | 65 | -- | ns | - |
| CSX | TCHW | Chip select "H" pulse width | 40 | -- | ns | Note 1: 500ns for display data |
| SCL | TSCYCW | Serial clock cycle (Write) | 16 | -- | ns | - |
| SCL | TSHW | SCL "H" pulse width (Write) | 7 | -- | ns | - |
| SCL | TSLW | SCL "L" pulse width (Write) | 7 | -- | ns | - |
| SCL | TSCYCR | Serial clock cycle (Read) | 150 | -- | ns | - |
| SCL | TSHR | SCL "H" pulse width (Read) | 60 | -- | ns | - |
| SCL | TSLR | SCL "L" pulse width (Read) | 60 | -- | ns | - |
| SDA (DIN) | TSDS | Data setup time | 7 | -- | ns | - |
| SDA (DIN) | TSDH | Data hold time | 7 | -- | ns | - |
| DOUT | TACC | Access time | 10 | 50 | ns | For maximum CL=30pF |
| DOUT | TOH | Output disable time | TBD | TBD | ns | For maximum CL=30pF |
3.5.2 Reset Timing
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us |
| RESX | TRT | Reset cancel | - | 5 | ms |
| Reset cancel | - | 120 | ms |
3.6 Inspection Standards (AQL)
The inspection standards follow GB/T 2828-2003 (Normal Inspection, Class II).
Acceptable Quality Level (AQL): Major Defect: 0.65, Minor Defect: 1.5.
3.6.1 Defect Criteria (Extracts)
| No | Defect Item | Criteria |
|---|---|---|
| 11 | Black/White dots, Dirty dots, Eyewinker (Major defect) |
|
| 3.1.4 | Black tape & Mara tape defects |
|
3.7 Design Notes from Documentation
- B/L Driver: The backlight driving condition is IF=60mA, Vf=2.8~3.3V (TYP) for 4 parallel LEDs.
- Mechanical: Tolerance of segments to edge of glass: ±0.2mm. The FPC includes steel plate reinforcement (钢片补强) with a total thickness of 0.30mm (FPC+钢片补强). Silver paste points are used for ESD protection.
- Touch Panel (CTP): The module is designed to support an integrated Capacitive Touch Panel (CTP) via a dedicated 6-pin interface (Pins 19-24). The CTP uses CST816 IC with OGS structure. Touch mode: Single point/Cesture. Surface hardness ≥ 6H. The module drawing shows both LCM-only and LCM+CTP configurations.
- Housing: It is recommended that the housing visual area be at least 0.3mm smaller than the VA (Viewing Area) on each side. The housing foam window should be at least 0.6mm larger than the VA on each side. TP edge should not contact metal conductors to avoid ESD or short circuit risks.
- RoHS & Halogen-Free: All materials must comply with RoHS and Halogen-Free standards.
- Module Luminance: The module luminance is 400 cd/m².
4. Application Guidelines & Critical Notes
- Power Supply: The module requires a 2.8V (Typ.) power supply for VCC and 1.8V (Typ.) for IOVCC. Ensure the power supply ripple is minimized.
- Interface: This module uses a high-speed QSPI interface. The host processor must have a QSPI controller or be capable of bit-banging the Quad SPI protocol.
- Backlight Driver (External): An external constant current driver is required to supply a typical current of 60mA at a forward voltage of 2.8V to 3.3V.
- Touch Panel (CTP): The integrated CTP requires an IIC interface from the host processor. The VDD for the CTP is typically 3.3V.
- Reset: A hardware reset pin (RESET, Pin 9) is provided. A low pulse of at least 10µs is required for a valid reset.
- Handling Precautions: Handle the module with care to avoid damage to the glass or FPC. Ground yourself to prevent electrostatic discharge (ESD).
5. Conclusion & Design-In Support
The LSC016I02-QS-V1 from Lesson Smart Display Technology is a 1.6-inch TFT-LCD module with an IPS panel and high brightness of 400 cd/m². It is a compact, high-resolution square display solution suitable for a wide variety of embedded display applications such as smartwatches, instruments, and AIoT devices.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and the ST77903 driver IC datasheet for detailed command initialization.
- Design a clean 2.8V/1.8V power supply and a backlight constant current driver circuit capable of delivering 60mA at 2.8V~3.3V.
- Configure the host processor's QSPI interface to match the timing specifications detailed in this datasheet.
- Contact the manufacturer for evaluation modules, sample requests, and further technical support during the design-in phase.
This module is designed to provide a reliable, vibrant, and high-brightness display solution for a wide array of applications.
