Product Main Title:
LSL050I28-R-V1: 4.96-Inch IPS TFT LCD Module, 480x854 Resolution, 16.7M Colors, 18-bit RGB Interface, ST7102 Driver, for Embedded Display Applications
Product Subtitle / Keywords:
4.96 Inch IPS Display, 480x854 Resolution, Transmissive a-Si TFT, Free (IPS) Viewing Direction, 18-bit RGB Parallel Interface, ST7102 Driver IC, COG+FPC+B/L, 16.7M Colors, -20°C to +60°C Operation, Detailed Pinout & Electrical Specs
Comprehensive Technical Specification & Application Guide
1. Executive Summary & Product Positioning
The LSL050I28-R-V1, developed by LESSON (Wan'an) Zhixian Technology Co., Ltd., is a medium-sized transmissive amorphous Silicon TFT-LCD module. This product specification book serves as the definitive technical document, meticulously defining its structural composition (TFT-LCD panel, driver circuit, backlight unit), mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, pin functions, interface timing, and photoelectric performance indicators. It delivers a resolution of 480(RGB)×854 with 16.7 million color capability, featuring an IPS panel for free viewing direction without grayscale inversion. The results indicate that the module meets the specific design requirements for embedded display applications in terms of structure, driving, optics, and electrical performance. It is recommended to base system matching and verification on the dimensional, electrical limit, temperature range, and photoelectric performance data in this specification during design selection.
2. Detailed Product Overview & Architecture
- Core Technology: Transmissive-type a-Si TFT-LCD.
- Display Characteristics: Capable of displaying up to 16.7 million colors.
- Module Construction: Composed of a TFT-LCD panel, a driver circuit, and a backlight unit.
- Interface: 18-bit RGB Parallel Interface, suitable for direct connection to processors with RGB output.
- Viewing Direction: Free (IPS).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
- Panel Size (Diagonal): 4.96 inches
- Active Area (H×V): 61.78 mm × 109.91 mm
- Module Size (H×V×D): 70.00 mm × 157.10 mm × 2.86 mm
- Resolution: 480 (RGB) × 854 pixels
- Display Mode: Active matrix TFT, Transmissive type
- Drive IC: ST7102
3.2 Electrical & Interface Specifications
3.2.1 Absolute Maximum Ratings
| Item | Symbol | Min | Max | Unit | Remark |
|---|---|---|---|---|---|
| Supply voltage (I/O) | IOVCC | -0.3 | +3.6 | V | |
| Supply voltage (Analog) | VCC | -0.3 | +3.3 | V | |
| Operating temperature | TOPR | -20 | 60 | °C | |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.2 Electrical Characteristics (DC)
| Item | Symbol | Min | Typ | Max | Unit | Remark |
|---|---|---|---|---|---|---|
| I/O Supply voltage | IOVCC | -- | 1.8 | 3.3 | V | |
| Analog Supply voltage | VCC | -- | 3.3 | -- | V | |
| Input Voltage (L) | VIL | GND | -- | 0.3*IOVCC | V | |
| Input Voltage (H) | VIH | 0.7*IOVCC | -- | IOVCC | V |
3.2.3 Pin Description (Excerpt from 26+ pin list)
| PIN NO. | Symbol | I/O | Description |
|---|---|---|---|
| 1 | LEDK | P | Power for LED backlight cathode |
| 2 | LEDA | P | Power for LED backlight anode |
| 3, 6, 12-14, 21, 22 | GND | P | Ground |
| 4 | VCC3.3V | P | Analog power supply (3.3V) |
| 5 | IOVCC3.3V | P | I/O power supply (3.3V) |
| 7 | SDI | I | SPI input data pin |
| 8 | SDO | O | SPI output data pin |
| 9 | SCL | I | SPI clock pin |
| 10 | CS | I | Chip select pin |
| 11 | RESET | I | Reset pin |
| 15-20 | R5-R0 | I | Red data bus (6-bit) |
| 23-26 | G5-G2 | I | Green data bus (4-bit, excerpt) |
| (Pins for Blue data bus B5-B0 continue beyond pin 26.) | |||
| This indicates an 18-bit RGB interface (6+6+6) using separate R, G, B buses, alongside an SPI interface (pins 7-10) likely for initialization/command. |
3.2.4 SPI Serial Interface Timing Characteristics (IOVCC=1.8V, Ta=25°C)
The spec provides SPI timing parameters (values TBD in excerpt), structured similarly to other models:
- Chip Select: Setup/Hold/Pulse width (
T_CSS,T_CSH,T_CHW). - Serial Clock (SCL): Cycle time and H/L pulse widths for Write/Read (
T_SCYCW,T_SHW,T_SLW,T_SCYCR,T_SHR,T_SLR). - Serial Data (SDA/DIN): Setup/Hold time (
T_SDS,T_SDH). - Output Access/Disable Time:
T_ACC,T_OH.
4. Application Guidelines & Critical Notes
- Intended Use: Embedded systems, portable multimedia devices, industrial HMIs—applications requiring a medium-sized, high-color-depth display with a parallel RGB interface.
- Critical Design Considerations:
- Dual Power Supplies: Provide both 3.3V analog (VCC) and 1.8V/3.3V I/O (IOVCC) supplies as per electrical characteristics. Note the IOVCC level dictates the logic high/low thresholds.
- Dual Interface Usage: The module appears to use SPI for initialization/control and 18-bit RGB for pixel data. The host system must support this hybrid approach, sending initialization commands via SPI before switching to RGB data streaming.
- RGB Data Bus: Ensure the host controller can drive the 18-bit wide (6 bits per color) data bus with proper timing relative to control signals (likely HSYNC, VSYNC, DE, PCLK - though not explicitly listed in the excerpt).
- Reset Circuit: Implement a proper reset circuit using the RESET pin.
- Backlight Driver: Design an external driver for the LED backlight (anode/cathode pins provided).
- Handling: Observe standard ESD precautions.
5. Conclusion & Design-In Support
The LSL050I28-R-V1 specification outlines a capable 4.96-inch IPS display module with a high-color-depth RGB interface. Its key feature is the dedicated 18-bit RGB parallel bus combined with an SPI control channel, offering a potential performance advantage for graphics-intensive applications. Successful integration requires careful management of the dual power domains and understanding the protocol for initializing the display via SPI before using the RGB interface. Designers should obtain the complete specification for the full pinout (including all RGB and control pins) and the finalized timing parameters to ensure a compatible and reliable design.
