Tags & Keywords
#TFT-LCD #TN #RGB #SPI #2.83inch #240x320 #262KColors #QVGA #COG #Transmissive #IndustrialControl #PortableDevice #MCUInterface #RoHS #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LS028I25-R-V1, a 2.83-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring QVGA resolution (240x320), 262K colors, and a TN panel, this module is designed as a versatile display solution. With support for both RGB and SPI interfaces and comprehensive specifications covering electrical and timing characteristics, it serves as a flexible choice for industrial control panels, portable instruments, consumer electronics, and various embedded systems.
Key Specifications
- Brand & Model: LESSON Smart Display LS028I25-R-V1
- Screen Size: 2.83 inches (diagonal)
- Active Area: 43.2 mm (H) × 57.60 mm (V)
- Driver IC: JD9853
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Transmissive, TN (Twisted Nematic)
- Module Type: COG + FPC + B/L
- Display Resolution: 240(RGB) × 320 pixels (QVGA)
- Display Colors: Up to 262K Colors
- Module Outline Dimensions: 46.5 mm (H) × 65.05 mm (V) × 2.11 mm (D)
- Interface: Dual Interface (Selectable) – RGB Interface (6-bit: D0-D5) and SPI Interface (CS, SDA, SCL).
- 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 / +4.0V
- 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.
- Interface Timing (RGB Mode @ IOVCC=1.8V, VCI=2.8V):
- Pixel Clock Cycle (PCLKCYC): Min. 55 ns (~18.2 MHz max)
- Data Setup/Hold Time (DST/DHT): Min. 25 ns
- VSYNC/HSYNC Setup/Hold Time: Min. 25 ns
- Backlight: Integrated LED backlight (Pins implied)
- Environmental Compliance: RoHS Compliant
General Description
The LS028I25-R-V1 is a flexible display module built around a standard TN panel. Its 2.83-inch QVGA format is a common size for embedded displays. The module supports dual interfaces: a faster 6-bit RGB interface (using D0-D5, HS, VS, DCLK) for processors with LCD controllers, and a pin-saving SPI interface (using CS, SDA, SCL) for simpler microcontrollers.
The specification provides a pin description table showing the dual-purpose pins (e.g., D0-D5 serve as RGB data in RGB mode and have other functions in SPI mode). It includes detailed RGB interface timing characteristics with defined minimum values for critical parameters, ensuring reliable data transfer when using the RGB mode. The presence of both interfaces makes it highly adaptable to different host system architectures.
Pin Description (Key Pins - RGB Mode Focus)
| PIN NO. | Symbol | I/O | Description (RGB Mode) |
|---|---|---|---|
| 5 | HS | I | Horizontal sync for RGB interface |
| 6 | VS | I | Vertical sync for RGB interface |
| 7 | DCLK | I | Dot clock for RGB interface |
| 8-13 | D5-D0 | I | 6-bit RGB interface data bus |
| 2 | CS | I | Chip select (SPI mode) / Likely fixed in RGB mode |
| 3 | SDA | I/O | Serial data (SPI mode) / Likely NC in RGB mode |
| 4 | SCL | I | Serial clock (SPI mode) / Likely NC in RGB mode |
Application Scenarios
- Industrial Control Panels: Equipment status displays, control readouts.
- Portable Instruments: Handheld meters, data loggers, test equipment.
- Consumer Electronics: Portable gadgets, smart home device interfaces.
- Point-of-Sale Devices: Compact terminal displays.
- Prototyping & Education: Flexible for teaching different display interfaces.
Conclusion
The LESSON Smart Display LS028I25-R-V1 is a versatile and well-specified display solution. Its dual-interface support (RGB/SPI) provides significant design flexibility, allowing it to be used in both performance-oriented and cost/pin-constrained projects. The clear RGB timing specs facilitate stable integration, making it a reliable choice for a wide range of embedded applications.
