LS0146I02-M-V1 1.46 inch TFT-LCD Module 360x360 262k Colors IPS
1. Executive Summary & Product Positioning
The LS0146I02-M-V1 is a 1.46-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 1.46 inch and the resolution is 360(RGB)*360, the panel can display up to 262k colors.
Product Positioning: This module features a compact 1.46-inch IPS (In-Plane Switching) panel, offering superior viewing angles (Free/Grayscale Inversion Free) and a high typical contrast ratio of 1200:1. With a standard 8080 MCU 8-bit parallel interface, it is well-suited for a wide range of embedded systems such as smart wearables, small home appliances, and industrial handheld devices requiring high-resolution and high-quality round or square displays.
2. Detailed Product Overview & Architecture
The module's architecture is designed for robust performance and easy integration. The primary components include:
- TFT-LCD Panel: 1.46-inch diagonal, a-Si TFT active matrix, transmissive, IPS mode. Resolution is 360(RGB) × 360 pixels with an active area of 36.936 (H) × 36.936 (V) mm.
- Driver IC: The module uses the ST77916 driver IC, communicating via an 8080 MCU 8-bit Parallel 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=2.7~2.9V.
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The module outline dimensions are 40.46 (H) × 40.46 (V) × 1.66 (D) mm.
- Interface: The module communicates via a 20-pin FPC connector. The display interface is 8080 MCU 8-bit Parallel Interface.
- Display Mode: Transmissive, IPS, Normally Black.
- Viewing Direction: IPS (Free / Grayscale Inversion Free).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 1.46 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 |
| Viewing Direction (Grayscale Inversion) | Free (IPS) |
| Input Data Interface | 8080 MCU 8-bit Parallel |
| Driver IC | ST77916 |
| Module Size (H×V×D) | 40.46 × 40.46 × 1.66 mm |
| Active Area (AA, H×V) | 36.936 × 36.936 mm |
| Pixel Arrangement | RGB Stripe |
| Display Mode | Active matrix TFT, Transmissive type |
| Backlight Type | 3 Chip-White LED Parallel |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
3.2 Electrical Characteristics
3.2.1 Recommended Operating Conditions
Condition: VDDI=1.65 to 3.3V, VDD=2.65 to 3.3V, GND=RGND=0V, Ta=25°C.
| Item | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply voltage | VCC | 2.65 | 2.8 | 3.3 | V |
| I/O supply voltage | IOVCC | 1.65 | 1.8 | 3.3 | V |
| Input voltage (L level) | VIL | 0 | --- | 0.3*IOVCC | V |
| Input voltage (H level) | VIH | 0.7*IOVCC | --- | IOVCC | V |
3.2.2 Backlight LED Characteristics
The backlight consists of 3 Chip-White LEDs in Parallel. The backlight drive condition is IF=60mA, Vf=2.7~2.9V.
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | Vf | 2.7 ~ 2.9 | V |
| Forward Current | If | 60 | mA |
3.3 Interface Pin Assignment (20-Pin FPC)
Connector: 20-pin FPC. Interface: 8080 MCU 8-bit Parallel.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | D2 | I | Interface data bus (bit 2) |
| 2 | GND | P | Ground |
| 3 | RS | I | Display data/command selection pin in parallel interface |
| 4 | WR | I | Write enable in MCU parallel interface |
| 5 | RD | I | Read enable in 8080 MCU parallel interface |
| 6 | CS | I | Chip selection pin |
| 7 | D1 | I | Interface data bus (bit 1) |
| 8 | D3 | I | Interface data bus (bit 3) |
| 9 | D4 | I | Interface data bus (bit 4) |
| 10 | D5 | I | Interface data bus (bit 5) |
| 11 | D6 | I | Interface data bus (bit 6) |
| 12 | D7 | I | Interface data bus (bit 7) |
| 13 | RST | I | This signal will reset the device |
| 14 | VDD | P | Power supply (2.8V Typ.) |
| 15 | VDDIO | P | I/O Power supply (1.8V Typ.) |
| 16 | D0 | I | Interface data bus (bit 0) |
| 17 | TE | O | Tearing effect signal |
| 18 | GND | P | Ground |
| 19 | LEDA | P | Power for LED backlight anode |
| 20 | LEDK | P | Power for LED backlight cathode |
3.4 Timing Characteristics
3.4.1 8080 Series MCU Parallel Interface Characteristics: 8-bit Bus
Test conditions: VDDI=1.65 to 3.3V, VDD=2.65 to 3.3V, GND=RGND=0V, Ta=25°C.
| Signal | Symbol | Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|---|---|
| D/CX | TAST | Address setup time | 0 | -- | ns | - |
| D/CX | TAHT | Address hold time (Write/Read) | 10 | -- | ns | - |
| CSX | TCHW | Chip select "H" pulse width | 0 | -- | ns | - |
| CSX | TCS | Chip select setup time (Write) | 15 | -- | ns | - |
| CSX | TRCS | Chip select setup time (Read ID) | 45 | -- | ns | - |
| CSX | TRCSFM | Chip select setup time (Read FM) | 355 | -- | ns | - |
| CSX | TCSF | Chip select wait time (Write/Read) | 10 | -- | ns | - |
| CSX | TCSH | Chip select hold time | 10 | -- | ns | - |
| WRX | TWC | Write cycle | 30 | -- | ns | - |
| WRX | TWRH | Control pulse "H" duration | 14 | -- | ns | - |
| WRX | TWRL | Control pulse "L" duration | 14 | -- | ns | - |
| RDX (ID) | TRC | Read cycle (ID) | 160 | -- | ns | When read ID data |
| RDX (ID) | TRDH | Control pulse "H" duration (ID) | 90 | -- | ns | When read ID data |
| RDX (ID) | TRDL | Control pulse "L" duration (ID) | 45 | -- | ns | When read ID data |
| RDX (FM) | TRCFM | Read cycle (FM) | 450 | -- | ns | When read from frame memory |
| RDX (FM) | TRDHFM | Control pulse "H" duration (FM) | 90 | -- | ns | When read from frame memory |
3.4.2 Reset Timing
| Related Pins | Symbol | Parameter | MIN | MAX | Unit |
|---|---|---|---|---|---|
| RESX | TRW | Reset pulse duration | 10 | - | us |
| RESX | TRT | Reset cancel (during SLPIN mode) | - | 5 | ms |
| Reset cancel (during SLPOUT mode) | - | 120 | ms |
3.5 Electro-Optical Characteristics (Ta=25°C)
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Response time | Tr + Tf | θx = θy =0 | -- | 30 | 35 | ms | Note 1 |
| Contrast Ratio | CR | θx = θy =0 | 900 | 1200 | -- | -- | Note 2 |
| Transmittance | T% | θx = θy =0 | 2.5 | 2.94 | -- | % | -- |
| Color Chromaticity (CIE1931) White | W x, W y | θx = θy =0 | -- | (0.294, 0.323) | -- | -- | -- |
| Viewing angle (All directions) | θT, θB, θL, θR | CR > 10 | 80 | 85 | -- | Deg. | Note 3 |
3.6 Design Notes from Documentation
- B/L Driver: The backlight driving condition is IF=60mA, Vf=2.7V~2.9V for 3 parallel LEDs.
- Mechanical: Tolerance of segments to edge of glass: ±0.2mm. The module includes PI reinforcement on the FPC with a total thickness of 0.3mm (FPC+PI补强). Silver paste points are used for ESD protection.
- 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: RoHS compliance is expected.
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 standard 8-bit 8080 parallel interface. The microcontroller must be configured for this protocol, managing signals such as CS, RS, RD, WR, and the 8-bit data bus D0-D7.
- Backlight Driver (External): An external constant current driver is required to supply a typical current of 60mA at a forward voltage of 2.7V to 2.9V.
- Reset: A hardware reset pin (RST, Pin 13) 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 LS0146I02-M-V1 from Lesson Smart Display Technology is a 1.46-inch TFT-LCD module with an IPS panel. It is a compact, high-resolution solution suitable for a wide variety of embedded display applications requiring wide viewing angles and high contrast in a small form factor.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and the ST77916 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 2.7V to 2.9V.
- Configure the host MCU's parallel interface to match the 8-bit 8080 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 and vibrant display solution for a wide array of applications.
