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Laura
Laura

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Choosing the Right TFT Display Interface: SPI, RGB, LVDS, or MIPI?

When integrating a TFT display into your embedded system or product, choosing the right interface is as important as selecting the screen size or resolution.

We've worked with a variety of projects—from handheld tools to industrial controllers—and here's a quick breakdown of what we’ve learned about the common interface types:

🔹 SPI (Serial Peripheral Interface)

  • ✅ Simple wiring, widely supported by MCUs
  • 🚫 Slow refresh rate, not ideal for full-color video or large displays
  • 📌 Best for small displays (≤3.5”) and low-power applications

🔹 RGB Parallel

  • ✅ Good for fast screen refresh, real-time updates
  • 🚫 Requires many GPIOs; routing can get messy
  • 📌 Often used in devices with basic Linux systems or mid-range MCUs

🔹 LVDS (Low Voltage Differential Signaling)

  • ✅ Great for EMI performance and long-distance transmission
  • 🚫 Slightly more complex driver setup
  • 📌 Common in industrial applications, 7”+ displays

🔹 MIPI DSI

  • ✅ High bandwidth, low pin count, sleek design
  • 🚫 Not all controllers support it natively
  • 📌 The go-to interface in smartphones and modern compact devices

🔧 Pro Tip: Interface choice affects your system design, EMI testing, and even housing layout. Always confirm compatibility with your board early to avoid late-stage surprises.

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