1. Introduction and Overview
The Huidu HD-WF series (HD-WF1, HD-WF2, HD-WF4) are full-color LED display control cards designed for various applications including door lintel LED screens, store signboard screens, and vehicle-mounted displays. These control cards support Wi-Fi and U-disk for program updates, offering a convenient and cost-effective solution for managing LED content.
The primary application software for these devices includes HD2020 and LedArt (APP), providing a user-friendly interface and rich display modes.

2. Product Features
- Module Support: Compatible with HUB75 port full-color modules, supporting both normal and ICN2038 ICs.
- Scan Mode: Supports static to 1/32S scan modes.
- Control Range: Up to 640*32 pixels or 320*64 pixels.
- Communication Ports: Wi-Fi and U-Disk for program updates.
- FLASH Capacity: 4M Byte.
- Color Support: Full-color module capability, displaying red, green, blue, yellow, purple, cyan, and white.
- Gray Level: 8 levels, supporting full-color text.
- Program Quantity: Stores up to 999 programs, with Wi-Fi remote switching capability.
- Area Quantity: Supports 20 areas, each with separate zones, special effects, and borders.
- Display Content: Text, animated words, 3D words, images & text (pictures, SWF files), Excel data, time, temperature (humidity), timing, count, and lunar calendar.
- Automatic Screen Switch: Features a timer for automatic screen on/off.
- Dimming: Supports brightness adjustment and time-period brightness settings.
- Power Supply: Micro USB, standard 5V.
3. Setup and Installation
3.1 Port Definition
Familiarize yourself with the various ports and components on the control card:

- Micro-USB port: Used for 5V power supply. Can be powered directly via a Micro-USB cable.
- 5V standard power connector: Shares power with the Micro-USB port and can directly power the LED module.
- USB ports: For updating programs using a U-disk.
- HUB75E port: Connects to the LED display.
- Test key: Used for testing the status of the LED screen.
3.2 Initial Connection
To set up your Huidu LED control card:
- Connect a 5V power supply to either the Micro-USB port or the 5V standard power connector.
- Connect the HUB75E port on the control card to your LED display module using a compatible cable.
- Ensure all connections are secure before powering on the device.
4. Operating Instructions
4.1 Program Updates
Programs can be updated via two methods:
- Wi-Fi: Use the HD2020 software or LedArt mobile application to connect to the control card via Wi-Fi and upload new programs.
- U-Disk: Save your program files to a U-disk and insert it into the USB port on the control card. The card will automatically detect and update the programs.
4.2 Display Content Management
The control card supports a wide range of display content and features:
- Content Types: Display text, animated words, 3D words, images, SWF files, Excel data, current time, temperature, humidity, countdown/up timers, and lunar calendar information.
- Program Switching: Manage and switch between up to 999 stored programs, including remote switching via Wi-Fi.
- Area Management: Divide your display into up to 20 independent areas, each configurable with unique content, special effects, and borders.
4.3 Brightness and Timing
- Brightness Adjustment: Adjust the display brightness manually or set up time-period based automatic dimming.
- Automatic Screen On/Off: Configure a timer for the automatic switching on and off of the LED screen.
5. Maintenance
To ensure the longevity and optimal performance of your Huidu LED control card, follow these general maintenance guidelines:
- Keep the control card clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to moisture, extreme temperatures, or direct sunlight.
- Ensure a stable 5V power supply is used to prevent damage.
- Regularly check all cable connections for looseness or damage.
6. Troubleshooting
If you encounter issues with your Huidu LED control card, refer to the following common problems and solutions:
- No Display:
- Verify that the 5V power supply is correctly connected and functioning.
- Check the HUB75E connection between the control card and the LED display.
- Ensure a program has been successfully loaded onto the control card.
- Incorrect Display/Garbled Content:
- Confirm that the correct module type and scan mode settings are configured in the HD2020 software or LedArt app.
- Re-upload the program to ensure data integrity.
- Wi-Fi Connection Issues:
- Ensure the control card is within range of your Wi-Fi network.
- Check for correct Wi-Fi password and network selection in the application.
- U-Disk Update Failure:
- Ensure the program files on the U-disk are in the correct format.
- Try using a different U-disk to rule out U-disk malfunction.
- Verify the U-disk is properly inserted into the USB port.
7. User Tips
- For complex display requirements, experiment with the 20 separate areas feature to create dynamic and multi-faceted content layouts.
- Utilize the time-period brightness setting to automatically adjust display intensity, saving energy and extending LED lifespan, especially for outdoor applications.
- Always back up your display programs on a computer or separate U-disk before making significant changes.
8. Specifications
| Feature | Description |
|---|---|
| Model Numbers | HD-WF1, HD-WF2, HD-WF4 |
| Module Support | HUB75 port full color module, normal and ICN2038 IC |
| Scan Mode | Static to 1/32S |
| Control Range | 640*32, 320*64 |
| Communication Ports | Wi-Fi, U-Disk |
| FLASH Capacity | 4M Byte |
| Color Support | Full-color (Red, Green, Blue, Yellow, Purple, Cyan, White) |
| Gray Level | 8 levels, full color text support |
| Program Quantity | 999 programs |
| Area Quantity | 20 areas with separate effects/borders |
| Power Supply | Micro USB, standard 5V |
| Certifications | CE, FCC, RoHS, BIS |
9. Warranty and Support
For technical assistance or support, please contact the manufacturer or your vendor. Technical support can often be provided via phone, messaging applications like WhatsApp/WeChat, or through dedicated training sessions if available.
Specific warranty details may vary by region and seller. Please refer to your purchase documentation for warranty information.
10. Certifications
The Huidu HD-WF series control cards comply with international standards, holding the following certifications:
- CE (Conformité Européenne)
- FCC (Federal Communications Commission)
- RoHS (Restriction of Hazardous Substances)
- BIS (Bureau of Indian Standards)






