Tags & Keywords
#TFT-LCD #TN #SPI #1.44inch #128x128 #262KColors #COG #Transmissive #SquareDisplay #EmbeddedDisplay #IndustrialHMI #PortableDevice #MCUInterface #RoHS #Backlight #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LS0144T09-S-V1, a compact 1.44-inch square transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring a square 128x128 pixel resolution, 262K colors, and a TN (Twisted Nematic) panel, this module is designed as a cost-effective and space-efficient display solution for embedded systems. With its simple 4-line SPI interface and detailed specifications covering electrical, mechanical, and optical characteristics, it serves as a practical choice for a wide range of applications including consumer electronics, industrial controls, and portable devices.
Key Specifications
- Brand & Model: LESSON Smart Display LS0144T09-S-V1
- Screen Size: 1.44 inches (diagonal)
- Active Area: 25.5 mm (H) × 26.5 mm (V) (Square)
- Driver IC: GC9109
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Transmissive, TN (Twisted Nematic)
- Module Type: COG + FPC + B/L
- Display Resolution: 128(RGB) × 128 pixels (Square)
- Display Colors: Up to 262K Colors
- Module Outline Dimensions: 29.5 mm (H) × 36.5 mm (V) × 2.5 mm (D)
- Interface: 4-line Serial Interface (SPI) (Pins: CS, SCL, SDA, RS, RESET, TE)
- Supply Voltages:
- VCC (Main Power): 2.6V ~ 3.3V (Typical: 2.8V)
- IOVCC (I/O Power): 1.65V ~ 3.3V (Typical: 1.8V)
- Absolute Maximum Ratings:
- VCC / IOVCC: -0.3V to +4.6V
- Operating Temperature (T_OPR): -20°C to +70°C
- Storage Temperature (T_STR): -30°C to +80°C
- DC Electrical Characteristics: Defines VIL, VIH levels relative to IOVCC.
- Backlight: Integrated LED backlight (Pins: LEDA, LEDK)
- Optical Characteristics (Typical @ I_F=40mA):
- Luminance: 260 cd/m²
- Contrast Ratio: 600:1
- Response Time (Tr+Tf): <32 ms
- Viewing Angle (CR>10): 60° (All sides: Top, Bottom, Left, Right)
- Environmental Compliance: RoHS Compliant
General Description
The LS0144T09-S-V1 is an economical and compact square display module built around a standard TN panel. Its 1.44-inch square format with 128x128 resolution is suitable for displaying icons, simple graphics, or text status. The module is controlled via a standard 4-line SPI interface (Chip Select CS, Serial Clock SCL, Serial Data SDA, Command/Data Select RS, Reset, and Tearing Effect TE output).
The specification is quite thorough. It provides a detailed pin description for its 14-pin connector. It includes comprehensive SPI timing characteristics for both write and read operations, with defined minimum and maximum values for parameters like chip select time (tcss=20ns min), serial clock cycle (twc=12.5ns min for write, trc=150ns min for read), and data setup/hold times (tds=5ns min). A detailed power on/off sequence diagram and notes are also included, which is crucial for reliable initialization.
Pin Description
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | NC | - | No Connection |
| 2 | GND | P | Ground |
| 3 | LEDK | P | Backlight LED Cathode |
| 4 | LEDA | P | Backlight LED Anode |
| 5 | GND | P | Ground |
| 6 | RESET | I | Reset pin (for chip initialization) |
| 7 | RS | I | Data/Command selection pin (SPI) |
| 8 | SDA | I/O | Serial input/output data (SPI) |
| 9 | SCL | I | Clock signal (SPI) |
| 10 | VCI | P | Power supply (Analog, 2.6-3.3V) |
| 11 | IOVCC | P | I/O Power supply (1.65-3.3V) |
| 12 | CS | I | Chip selection signal (SPI) |
| 13 | GND | P | Ground |
| 14 | TE | O | Tearing effect output pin |
Application Scenarios
- Industrial Handhelds: Simple status displays for meters, data loggers.
- Consumer Electronics: Smart accessory displays, toy interfaces, basic gadgets.
- Medical Devices: Simple monitor readouts, low-cost diagnostic tools.
- Home Appliances: Display for thermostats, timers, controllers.
- Hobbyist & Prototyping: Low-cost display for Arduino/RPi projects.
Conclusion
The LESSON Smart Display LS0144T09-S-V1 is a well-documented, cost-effective display solution. Its clear SPI timing specifications, detailed power sequencing, and defined optical performance make it a reliable and straightforward choice for integrating a basic graphical display into products where cost, size, and ease of use are key considerations.
