Tags & Keywords
#TFT-LCD #IPS #RGB #3.45inch #640x480 #16.7MColors #VGA #COG #Transmissive #IndustrialDisplay #MedicalDisplay #EmbeddedDisplay #WideViewingAngle #RoHS #LESSON #SmartDisplay
Introduction
This document is the official product specification for the LS035I12-R-V1, a 3.45-inch transmissive a-Si TFT-LCD module developed by LESSON Smart Display Technology Co., Ltd. Featuring VGA resolution (640x480), 16.7 million colors, and an IPS panel for wide viewing angles, this module is designed for applications requiring a standard VGA format with excellent visual performance. With its 24-bit RGB parallel interface and comprehensive specifications covering mechanical, electrical, and optical characteristics, it serves as a robust solution for industrial HMIs, medical devices, portable instruments, and various embedded systems.
Key Specifications
- Brand & Model: LESSON Smart Display LS035I12-R-V1
- Screen Size: 3.45 inches (diagonal)
- Active Area: 70.08 mm (H) × 52.56 mm (V)
- Driver IC: NV3052C (as indicated in the Physical Features section)
- Display Technology: Transmissive type a-Si TFT-LCD
- Display Mode: Transmissive, IPS (In-Plane Switching), Normally Black, Mode Positive
- Module Type: COG + FPC + B/L
- Display Resolution: 640(RGB) × 480 pixels (VGA)
- Display Colors: Up to 16.7 Million Colors
- Module Outline Dimensions: 76.30 mm (H) × 63.30 mm (V) × 3.27 mm (D)
- Interface: 24-bit RGB Parallel Interface (Data: DB[23:0] for R[7:0], G[7:0], B[7:0]; Control: HSYNC, VSYNC, DE, DCLK)
- Input Data: 24-bit RGB
- Viewing Direction: Free (IPS)
- Supply Voltages:
- VDD (Main Power): 2.5V ~ 3.3V (Typical: 2.8V)
- IOVCC (I/O Power): 1.65V ~ 3.6V
- Absolute Maximum Ratings:
- VDD: -0.3V to +6.6V
- Operating Temperature (T_OPR): -20°C to +70°C
- Storage Temperature (T_STR): -30°C to +80°C
- Backlight: 12-CHIP White LEDs (Drive: I_F=40mA, V_F=16.8~19.2V)
- Optical Characteristics (Typical @ I_F=40mA):
- Brightness: 450 cd/m²
- Contrast Ratio: 800:1
- Response Time (Tr+Tf): 25 ms
- Viewing Angle (CR>10): 85° (All sides: Top, Bottom, Left, Right)
- Environmental Compliance: RoHS Compliant
General Description
The LS035I12-R-V1 is a high-quality display module built around a wide-viewing-angle IPS panel in a standard 4:3 VGA aspect ratio. It is controlled by the NV3052C driver IC, which supports a direct 24-bit RGB parallel interface. This interface is commonly used with processors that have a dedicated LCD controller, providing pixel data synchronized by HSYNC, VSYNC, and DCLK signals, with DE (Data Enable) as an optional mode.
The specification includes a detailed pin description for its 54-pin FPC connector, mapping all RGB data bits, control signals, power, and backlight pins. It provides RGB interface timing characteristics, defining parameters for the pixel clock (DCLK), data setup/hold times relative to DCLK, and the timing relationships between HSYNC, VSYNC, and the active display area (HBP, HFP, HSPW, VBP, VFP, VSPW). The electro-optical characteristics table is comprehensive, covering response time, contrast, transmittance, white point chromaticity, viewing angles, and luminance.
Pin Description (Key Pins)
| PIN NO. | Symbol | Description |
|---|---|---|
| 1-2 | LEDK | Backlight Cathode |
| 3-4 | LEDA | Backlight Anode |
| 12-35 | DB0-DB23 | 24-bit RGB Data Bus (B[0:7], G[0:7], R[0:7]) |
| 36 | HSYNC | Horizontal Sync |
| 37 | VSYNC | Vertical Sync |
| 38 | DCLK | Pixel Clock |
| 41-42 | VDD | Main Power (2.5-3.3V) |
| 52 | DE | Data Enable (for DE mode) |
| 53-54 | GND | Ground |
Application Scenarios
- Industrial HMIs: Control panels for automation, process monitoring, machinery.
- Medical Devices: Patient monitor interfaces, diagnostic equipment displays.
- Test & Measurement: Portable instrument displays, oscilloscopes, data loggers.
- Point-of-Sale (POS): Customer-facing displays, terminal interfaces.
- Embedded Systems: General-purpose displays for systems with RGB-capable MPUs.
Conclusion
The LESSON Smart Display LS035I12-R-V1 is a well-specified and reliable display solution that combines IPS visual quality with a standard RGB interface. Its detailed timing and pinout specifications make it straightforward to integrate with processors featuring an LCD controller, serving as a dependable component for a wide range of professional applications requiring a VGA-resolution display.
