LS0144T09-S-V1 1.44 inch TFT-LCD Module 128x128 262k Colors TN
1. Executive Summary & Product Positioning
The LS0144T09-S-V1 is a 1.44-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 1.44 inch and the resolution is 128(RGB)*128, the panel can display up to 262k colors.
Product Positioning: This module features a compact 1.44-inch TN (Twisted Nematic) panel. It is a cost-effective solution for applications that require a small, reliable, and easy-to-integrate color display with a serial SPI interface. Typical uses include portable instruments, smart home devices, wearable accessories, and other embedded HMI 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: 1.44-inch diagonal, a-Si TFT active matrix, transmissive, TN (Twisted Nematic) mode. Resolution is 128(RGB) × 128 pixels with an active area of 25.5 (H) × 26.5 (V) mm.
- Driver IC: The module uses the GC9109 driver IC.
- Backlight Unit (B/L): A white LED backlight with 2 Chip-White LEDs configured in parallel. The typical driving condition is IF=40mA, Vf=3.2V (Typ.). The typical luminance is 260 cd/m².
- Mechanical Construction: COG (Chip-on-Glass) + FPC + B/L. The module outline dimensions are 29.5 × 36.5 × 2.5 mm.
- Interface: The module communicates via a 14-pin FPC connector with a 4-Line SPI (Serial Peripheral Interface) system.
- Viewing Direction: TN (12 O'Clock).
3. Exhaustive Technical Specifications
3.1 General & Mechanical Specifications
| Item | Specification |
| Display Size (Diagonal) | 1.44 inches |
| Resolution (Dots) | 128(RGB) × 128 |
| Display Technology | Active Matrix TFT, Transmissive, a-Si, TN |
| Module Construction | COG+FPC+B/L |
| Color Depth | 262K Colors |
| Viewing Direction | TN (12 O'Clock) |
| Input Data Interface | 4-Line SPI |
| Driver IC | GC9109 |
| Module Size (H×V×D) | 29.5 × 36.5 × 2.5 mm |
| Active Area (H×V) | 25.5 × 26.5 mm |
| Display Mode | Transmissive, TN |
| 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.
| Parameter | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage | VCC | -0.3 | 4.6 | V | Note1 Note2 |
| Supply voltage | 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
| Parameter | 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 (Low level) | VIL | 0 | -- | 0.3*IOVCC | V |
| Input voltage (High level) | VIH | 0.7*IOVCC | -- | IOVCC | V |
3.3.2 Backlight LED Characteristics
The backlight consists of 2 Chip-White LEDs in Parallel.
| Parameter | Symbol | Typ | Unit |
|---|---|---|---|
| Forward Voltage | Vf | 3.2 | V |
| Forward Current | If | 40 | mA |
3.4 Interface Pin Assignment (14-Pin FPC)
Connector: 14-pin FPC. Interface: 4-Line SPI.
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Backlight Cathode |
| 2 | LEDA | P | Backlight Anode |
| 3 | GND | P | Ground |
| 4 | NC | -- | No connection |
| 5 | RESET | I | Reset signal (Active low) |
| 6 | GND | P | Ground |
| 7 | RS | I | Data/Command selection (High: Data, Low: Command) |
| 8 | GND | P | Ground |
| 9 | SDI | I | SPI data input |
| 10 | SCL | I | SPI clock |
| 11 | SDA | I/O | SPI data input/output |
| 12 | CS | I | Chip select (Active low) |
| 13 | VCC | P | Power Supply (2.8V) |
| 14 | IOVCC | P | I/O Power Supply (1.8V) |
3.5 Timing Characteristics
3.5.1 Power ON/OFF Sequence
IOVCC and VCI can be applied in any order. During power off, if LCD is in the Sleep Out mode, VCI and IOVCC must be powered down minimum 120msec after RESX has been released. During power off, if LCD is in the Sleep In mode, IOVCC or VCI can be powered down minimum 0msec after RESX has been released.
3.5.2 Display Serial Interface Timing (4-line SPI)
Ta = 25 °C, VDDI=1.65V to 3.3V, VDD=2.5V to 3.3V, AGND=VSSR=0V.
| Signal | Symbol | Parameter | Min | Max | Unit |
|---|---|---|---|---|---|
| CSX | tcss | Chip select time (Write) | 20 | - | ns |
| SCL | twc | Serial Clock Cycle (Write) | 12.5 | - | ns |
| D/CX | tas | D/CX setup time | 10 | - | ns |
| SDA/SDI (Input) | tds | Data setup time (Write) | 5 | - | ns |
3.6 Electro-Optical Characteristics
Electro-optical characteristics data was not available in the extracted context, but typical values for this type of module can be found in the official specification.
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|---|---|
| Luminance | L | IF=40mA | 220 | 260 | 300 | cd/m² | Note 4 |
3.7 Design Notes
- B/L Driver: The backlight driving condition is IF=40mA, Vf=3.2V (TYP) for 2 parallel LEDs.
- Mechanical: Tolerance of segments to edge of glass: ±0.2mm. TP edge should not contact metal conductors.
- 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.
- RoHS: RoHS compliance.
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 4-Line SPI interface. The microcontroller must be configured for this protocol.
- Backlight Driver (External): An external constant current driver is required to supply a typical current of 40mA at a forward voltage of 3.2V.
- Reset: A hardware reset pin (RESET, Pin 5) is provided. The reset pulse width must be a minimum of 10µs.
- 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 LS0144T09-S-V1 from Lesson Smart Display Technology is a compact 1.44-inch TFT-LCD module with a standard 128×128 resolution and a TN display. It is a cost-effective solution for applications that require a small, reliable, and easy-to-integrate color display with a SPI interface.
For successful design-in, engineers should:
- Obtain and review the complete, official Product Specification (Revision 1.0) for the full mechanical drawing and the GC9109 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 40mA.
- 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 cost-effective display solution for a wide array of embedded systems.
