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Reusing old laptop displays – FPGA-based HDMI splitter/videowall project – any easier solutions?

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(@thortherestore)
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Hi everyone,
I’m working on a project to give old 15.6″ (or other) laptop panels (1366×768 LVDS) a new purpose.

The idea is to build a DIY videowall-style controller board that takes a single HDMI input (ideally autodetecting 1080p/1440p/4K) and splits the signal into 6 separate LVDS outputs (2 rows × 3 columns). Each output should act as a tile of the overall image, so all six panels together display one large picture.

I’m currently planning to develop a custom FPGA-based board (initial prototype probably using Lattice ECP5), with:

  • 1× HDMI in → ADV7611 decoder

  • FPGA splits the frame into 6 sections

  • 6× SN75LVDS83B → LVDS outputs

  • optional SDRAM buffer (depending on needs)

  • 12 V in → 5 V / 3.3 V rails for I/O and backlight

Before I go too deep into this custom route:

👉 Has anyone here already attempted something similar?
👉 Are there existing boards / easier approaches (even if they require multiple controller boards, USB-C, DisplayLink, etc.) to drive multiple bare LVDS panels from a single or dual video source?
👉 Any clever hacks or resources you’d recommend before I start laying out the PCB?

My main goal is to find a practical way to reuse large quantities of salvaged laptop displays, even if that means deviating from the full FPGA approach.

Looking forward to any thoughts, experiences, or product suggestions!

Cheers,
Thor


 
Posted : 20/08/2025 5:16 pm