Tags & Keywords
#TFT-LCD #RGBInterface #3.95inch #480x480 #IPS #16.7MColors #ST77922 #DriverIC #DetailedSpecs #RoHS #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LSC0395I05-R-V1, a 3.95-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring a square resolution of 480(RGB)×480, 16.7 million colors, an IPS panel for wide viewing angles, and driven by the ST77922 controller IC, this module is a quality-focused solution with detailed driver-level specifications. It is designed for applications requiring reliable performance and clear driver integration data, such as industrial controls, test equipment, consumer devices, and automotive accessories, where understanding the controller's behavior is important.
Key Specifications
- Brand & Model: LESSON Smart Display LSC0395I05-R-V1
- Screen Size: 3.95 inches (diagonal) | 84x84x3.03mm
- Driver IC: ST77922
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Active matrix TFT, Transmissive type
- Viewing Direction: Free (IPS)
- Display Format: Graphic 480(RGB)×480 Dot-matrix
- Input Data: 8-bit RGB
- Display Colors: Up to 16.7 Million Colors
- Interface: Parallel RGB (8-bit: DB0-DB7) & SPI (CS, SCK, SDA)
- Absolute Maximum Ratings:
- Supply Voltage (VCC, IOVCC): -0.3V to 4.6V
- Operating Temperature (Topr): -20°C to +70°C
- Storage Temperature (Tstg): -30°C to +80°C
- Electrical Characteristics (Typical):
- VCC: 2.8V (2.65~3.3V)
- IOVCC: 1.8V (1.65~3.3V)
- Pin Description (26-pin connector): Includes backlight (LEDA/K), power (VCI), reset (RESET), SPI pins, and full RGB interface pins (DB0-DB7, PCLK, DE, VS, HS).
- Detailed Interface Timing:
- RGB Interface: Full timing table (T_SYNC: 15ns, T_CYCD: 30ns, etc.).
- SPI Interface: Detailed timing for both Write and Read operations (T_SCYCW: 16ns, T_SDS: 7ns, etc.), including output access time (T_ACC) and disable time (T_OH).
- Reset & Initialization: Defines reset pulse behavior (reject if <5us, start if 5-9us, reset if >9us) and provides a sequence diagram.
- Environmental Compliance: RoHS Compliant
General Description
The LSC0395I05-R-V1 specification provides deep insight into the ST77922 driver IC's characteristics. Beyond standard module specs, it includes detailed SPI timing for read operations and output driver characteristics (T_ACC, T_OH), which are crucial for bidirectional communication or when the host needs to read from the display controller. The reset pulse behavior is precisely defined, preventing accidental resets. The IPS technology ensures consistent viewing angles. This level of detail makes it particularly valuable for developers who need to implement robust communication or debug interface issues.
Key Features
- IPS Technology: Wide viewing angles for the square display.
- ST77922 Driver with Full Specs: Includes read timing and output driver details.
- Precise Reset Behavior Definition: Avoids system instability.
- Complete RGB & SPI Timing Tables: For reliable interface design.
- Clear Physical & Electrical Parameters.
Application Scenarios
- Industrial Control Panels: Where viewing angle and reliability are key.
- Bench Test Equipment: Oscilloscopes, signal generators.
- Quality Consumer Devices: Where IPS quality is a selling point.
- Automotive Aftermarket Displays: For center console upgrades.
- Projects requiring robust host-driver communication.
Conclusion
The LESSON Smart Display LSC0395I05-R-V1 is a well-documented module that shines in its detailed driver IC specification. It is highly recommended for engineers who value precise control over the display interface and need comprehensive timing data for their 3.95-inch square display projects.
