Tags & Keywords
#TFT-LCD #SPI #COG #IPS #1.9inch #QVGA #262KColors #EmbeddedDisplay #WearableTech #IndustrialHMI #PortableDevice #MCUInterface #WideViewingAngle #RoHS #Backlight #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LS019I05-S-V1, a compact 1.9-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Designed for space-constrained applications, this module features a tall 170x320 pixel resolution, 262K color depth, and a wide-viewing-angle IPS panel. Controlled via a standard 4-line SPI interface, it offers a reliable and straightforward solution for integrating a graphical display into wearable devices, portable instruments, smart home controls, and various embedded systems.
Key Specifications
- Brand & Model: LESSON Smart Display LS019I05-S-V1
- Screen Size: 1.9 inches (diagonal)
- Active Area: 22.695 mm (H) × 42.72 mm (V)
- Driver IC: ST7789P3 (as indicated in the Physical Features section)
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Active matrix TFT, Transmissive, IPS (In-Plane Switching)
- Module Type: COG + FPC + B/L (Chip-On-Glass, Flexible Printed Circuit, Backlight Unit)
- Display Resolution: 170(RGB) × 320 pixels
- Display Colors: 262 Thousand Colors (262K)
- Module Outline Dimensions: 25.8 mm (H) × 49.73 mm (V) × 2.07 mm (D)
- Interface: 4-line Serial Interface (SPI) (Pins: SPI_CS, SPI_SCL, SPI_RS, SPI_SDA, RESET). Includes a TE (Tearing Effect) output pin.
- Viewing Direction: All (IPS characteristic)
- Contrast Ratio: 800:1 (Typical)
- Response Time (Tr+Tf): 25 ms (Typical)
- Supply Voltages:
- VCC (Main Power): 2.4V ~ 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
- Backlight: 4-chip white LED in parallel (Drive condition: I_F=80mA, V_F=3.0V Typical)
- Environmental Compliance: RoHS Compliant
General Description
The LS019I05-S-V1 is a highly integrated, slim-profile display module ideal for applications where vertical space is available but width is limited. Its tall aspect ratio is perfect for displaying lists, status bars, or simple vertical GUIs. The module utilizes IPS technology, ensuring consistent color and contrast across wide viewing angles—a critical feature for devices held at various angles.
The heart of the module is the ST7789P3 driver IC, a popular and well-supported controller. Communication is handled through a 4-line SPI interface, requiring minimal host MCU pins (Chip Select, Clock, Data, Command/Data, Reset). The inclusion of a TE (Tearing Effect) output allows the host processor to synchronize frame buffer updates with the LCD's refresh cycle, preventing visual tearing artifacts.
The specification provides comprehensive SPI timing characteristics for both write and read operations, including detailed parameters for chip select, clock cycles, and data setup/hold times. This level of detail facilitates robust driver development. The document also outlines critical mechanical design guidelines, such as recommending the bezel opening to be 0.3mm smaller per side than the active area (VA area) and ensuring the backlight foam gasket opening is at least 0.6mm larger per side.
Pin Description
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Backlight LED Cathode |
| 2 | LEDA | P | Backlight LED Anode |
| 3 | GND | P | Ground |
| 4 | SPI_CS | I | SPI Chip Select (Active Low) |
| 5 | SPI_SCL | I | SPI Serial Clock |
| 6 | SPI_RS | I | SPI Register Select (Command/Data) |
| 7 | SPI_SDA | I/O | SPI Serial Data Input/Output |
| 8 | RESET | I | Reset (Active Low) |
| 9 | VCC | P | Main Power Supply (2.8V Typ.) |
| 10 | GND | P | Ground |
| 11 | TE | O | Tearing Effect Output |
| 12 | GND | P | Ground |
Application Scenarios
- Wearable Devices: Smart bands, fitness trackers, smart glasses.
- Portable Medical Devices: Handheld monitors, glucose meters, pulse oximeters.
- Industrial Handhelds: Data loggers, meter interfaces, portable test equipment.
- Smart Home & IoT: Thermostat displays, security keypads, appliance controls.
- Consumer Electronics: Secondary displays for peripherals, mini gaming devices.
Conclusion
The LESSON Smart Display LS019I05-S-V1 is a practical, well-documented, and easy-to-integrate display solution for compact vertical-format applications. Its combination of an IPS panel, the ubiquitous ST7789P3 SPI interface, clear operating specifications, and detailed mechanical integration notes makes it a reliable and efficient choice for designers aiming to add a quality graphical interface to space-constrained and power-sensitive products.
