LS018I02-QS-V1 1.8 inch TFT-LCD Module 360×360 262K Colors
1. Executive Summary & Product Positioning
The LS018I02-QS-V1 is a 1.8-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). The panel size is 1.8 inch and the resolution is 360(RGB)×360, the panel can display up to 262K colors. This module is a COG (Chip-on-Glass) + FPC + B/L (Backlight) construction with a product specification revision of 1.0, first released on 2024-12-02.
Product Positioning: This 1.8-inch square-format module is well-suited for a wide range of applications requiring a compact, round-like display with a wide viewing angle. It is ideal for smart wearable devices, portable instruments, smart home controllers, and other embedded display systems.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 1.8-inch diagonal, a-Si TFT active matrix, transmissive, IPS (In-Plane Switching) with free viewing direction. Resolution is 360(RGB) × 360 pixels.
- Driver Circuit: The module integrates the ST77916 driver IC, communicating via a QSPI interface.
- Backlight Unit (B/L): A white LED backlight with 3 Chip-White LEDs configured in parallel. The typical driving condition is IF=60mA, Vf=6V(Typ).
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The LCM outer dimension is 48.08 × 49.95 × 1.96 mm.
- Interface: The module communicates via a 16-pin FPC connector. The display interface is QSPI with integrated touch control signals (TP).
- Display Mode: Transmissive, Normally Black.
- Viewing Direction: Free viewing angle (IPS, ALL O'CLOCK).
- RoHS: All materials are compliant with RoHS standards.
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 1.8 inches |
| Resolution (Dots) | 360(RGB) × 360 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, IPS |
| Module Construction | COG+FPC+B/L |
| Color Depth | 262K Colors |
| Input Data Interface | QSPI |
| Driver IC | ST77916 |
| Module Size (H×V×D) | 48.08 × 49.95 × 1.96 mm |
| Active Area (H×V) | 45.684 × 45.684 mm |
| Module Luminance (without CTP) | 300 cd/m² (typ) |
| Display Mode | Transmissive, Normally Black |
| Viewing Direction | Free (IPS, ALL O'CLOCK) |
| Backlight Type | 3 Chip-White LED, Parallel |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Environmental Compliance | RoHS |
3.2 Absolute Maximum Ratings
Stress beyond those listed may cause permanent damage to the device.
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage | IOVCC | -0.3 | 4.0 | V | Note1 Note2 |
| Operating temperature | TOPR | -20 | 70 | °C | Note1 Note2 |
| Storage temperature | TSTR | -30 | 80 | °C | Note1 Note2 |
3.3 Electrical Characteristics
VDDI=1.65 to 3.3V, VDD=2.65 to 3.3V, GND=RGND=0V, Ta=25°C
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2.65 | 2.8 | 3.3 | V | Note1 |
| Supply voltage (I/O) | IOVCC | 1.65 | 1.8 | 3.3 | V | Note1 |
| Input Voltage L level | VIL | 0 | — | 0.3×IOVCC | V | Note1 |
| Input Voltage H level | VIH | 0.7×IOVCC | — | IOVCC | V | Note1 |
3.4 Backlight Circuit
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Backlight forward current | IF | 60 | mA |
| Backlight forward voltage | VF | 6.0 | V |
| LED Configuration | — | 3 Chip-White LED, Parallel | — |
3.5 Electro-Optical Characteristics
Measurement setup: CA310 / TOPCON CS2000, 50 cm distance, field = 1°
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time (Rise+Fall) | Tr+Tf | θx=θy=0° | — | 25 | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx=θy=0° | 800 | 1200 | — | — | Note 2 |
| Transmittance | T% | θx=θy=0° | 3.4 | 4.0 | — | % | — |
| Color Chromaticity (White) CIE1931 | Wx | θx=θy=0° | — | 0.297 | — | — | Note 4 |
| Color Chromaticity (White) CIE1931 | Wy | θx=θy=0° | — | 0.337 | — | — | Note 4 |
| Viewing Angle (Top) | θT | CR > 10 | 80 | 85 | — | Deg. | Note 3 |
| Viewing Angle (Bottom) | θB | CR > 10 | 80 | 85 | — | Deg. | Note 3 |
| Viewing Angle (Left) | θL | CR > 10 | 80 | 85 | — | Deg. | Note 3 |
| Viewing Angle (Right) | θR | CR > 10 | 80 | 85 | — | Deg. | Note 3 |
Note 1: Viewing angle is the angle at which the contrast ratio is greater than 10. Determined for the horizontal (3,9 o'clock) and vertical (6,12 o'clock) directions with respect to the optical axis normal to the LCD surface.
Note 2: Contrast measurements at viewing angle of Θ=0° and at the center of the LCD surface. CR = Luminance(white) / Luminance(black).
Note 3: Contrast measurements shall be made at viewing angle of Θ=0° and at the center of the LCD surface. Luminance shall be measured with all pixels in the view field set first to white, then to the dark (black) state.
Note 4: Color chromaticity coordinates calculated from spectral data with all pixels in red, green, blue and white. Measurements at the center of the panel.
4. Interface & Pin Description
4.1 Pin Description (16-pin FPC Connector)
| Pin No. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | TP_VCC | P | Power supply for touch panel |
| 2 | TP_RST | I | Reset pin for TP |
| 3 | TP_INT | O | Interrupt signal for TP |
| 4 | TP_SCL | I | SCL pin for TP |
| 5 | TP_SDA | I/O | SDA pin for TP |
| 6 | CS | I | Chip select pin |
| 7 | QSPI_CLK | I | Clock in SPI interface (SCL) |
| 8 | QSPI_IO0 | I/O | QSPI interface data bus |
| 9 | QSPI_IO1 | I/O | QSPI interface data bus |
| 10 | QSPI_IO2 | I/O | QSPI interface data bus |
| 11 | QSPI_IO3 | I/O | QSPI interface data bus |
| 12 | RST | I | This signal will reset the device and it must be applied to properly initialize the chip |
| 13 | VCC | P | Power supply |
| 14 | LEDK | P | Power for LED backlight cathode |
| 15 | LEDA | P | Power for LED backlight anode |
| 16 | GND | P | Ground |
5. Mechanical Drawing Reference
The module outline dimension is 48.08 mm (H) × 49.95 mm (V) × 1.96 mm (D). The active area measures 45.684 mm (H) × 45.684 mm (V) with 360(RGB) × 360 dots. The module uses COG (Chip-on-Glass) + FPC + B/L construction with a 16-pin FPC connector for the QSPI interface. The general tolerance is ±0.25 mm, with critical dimensions referenced for assembly.
6. Quality & Reliability
The LS018I02-QS-V1 module is manufactured in accordance with rigorous quality standards. The inspection standards are based on GB/T 2828-2003 (normal inspection, Class II) with defined Acceptable Quality Levels (AQL) for major and minor defects. Detailed criteria for glass defects, LCD appearance defects (viewing area), polarizer defects, FPC defects, and electrical anomalies are specified in the product specification.
Reliability: The module is designed to operate reliably within a temperature range of -20°C to +70°C and can be stored in temperatures from -30°C to +80°C.
7. Ordering Information & Compliance
Model Number: LS018I02-QS-V1
Revision: 1.0 (New released on 2024-12-02)
RoHS Compliance: This product is fully compliant with RoHS environmental standards, ensuring all materials and manufacturing processes adhere to the restriction of hazardous substances.
Manufacturer: 立信（万安）智显科技有限公司 (Lesson Smart Display Technology Co., Ltd)
