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H040HWQ40I3509-CT1 is a 4-inch TFT LCD module featuring a square-display with a resolution of 480x480 pixels. It incorporates IPS full-view technology and capacitive multi-touch functionality, driven by the GC9503CV chip. It supports both RGB and MIPI interface methods.
Designed with anti-interference capabilities and wide temperature operation support, this module is ideal for modern UI layouts. Its 1:1 square ratio is perfectly suited for smart panels, HMI human-machine interfaces, and IoT terminals. Common applications include smart home controllers (86 boxes), industrial PLC monitoring, and portable medical instruments like blood pressure monitors.
| Feature | Spec |
| Model Name | H040HWQ40I3509-CT1 |
| LCD Size | 4.0 inch |
| Display Format | 480x480 |
| Interface | RGB 40pin |
| Luminance | 300 cd/m2 |
| Touch screen | Capacitive Touch |
| Viewing Direction | ALL (IPS) |
| Color Depth | 262K |
| Driver IC | GC9503CV |
| LCM Size (W x H x D) | 84 * 84 * 3.22 mm |
| Active Area | 72.36 * 70.68 mm |
| Operating Temperature | -20°C ~ +70°C |
| Storage Temperature | -30°C ~ +80°C |
| Operating Voltage | 12.8V |
| Pin No. | Symbol | I/O | Description |
| 1 | LEDA | P | Power supply for backlight anode |
| 2-3 | LEDK1-K2 | P | Power supply for backlight cathode |
| 4 | GND | P | Power Ground |
| 5 | VCI | P | Power supply to internal logic (3.3V) |
| 6 | RESET | I | Reset signal (Active Low) |
| 9 | SDA | I/O | Serial data for RGB interface |
| 10 | SCK | I | Serial clock for RGB interface |
| 11 | CS | I | Chip select input |
| 12 | PCLK | I | Pixel clock input |
| 13 | DE | I | Data enable signal |
| 14 | VSYNC | I | Vertical sync signal |
| 15 | HSYNC | I | Horizontal sync signal |
| 16-33 | R/G/B Data | I | Red/Green/Blue data inputs (6-bit each) |
| 35 | TP_INT | O | Interrupt signal for Touch Panel |
| 36-37 | TP_SDA/SCL | I/O | I2C data/clock for Touch Panel |
| 38 | TP_RST | I | Touch Panel reset signal |
| 39 | TP_VCI | P | Power supply for Touch Panel (2.8V) |