Every display module needs an interface to talk to the rest of your system, and picking the wrong one is one of the most expensive mistakes to discover late — it usually means a new connector, a new driver board, or worse, a new panel. Here's a practical comparison of the four interfaces you'll encounter most often.
Quick comparison
| Interface | Typical speed | Pin count | Best for | Typical cost impact |
|---|---|---|---|---|
| MIPI-DSI | High (multi-Gbps) | Low (differential pairs) | Phones, tablets, high-res panels | Higher driver IC cost, thinner FPC |
| RGB (parallel) | Moderate | High (16–24+ pins) | Small-to-mid industrial TFTs | Lower IC cost, simpler driving |
| LVDS | Moderate-high | Moderate | Mid-to-large industrial panels, laptops | Balanced cost, longer cable runs OK |
| SPI | Low | Very low (4–6 pins) | Tiny displays, wearables, simple UIs | Lowest cost, slowest refresh |
MIPI-DSI: the phone-and-tablet default
MIPI-DSI is a serial interface built for high resolution at low pin count, which is why it dominates phone and tablet panels. If your product uses a smartphone-class OLED or a high-res tablet panel, you're almost certainly using MIPI. The tradeoff is driver complexity — you generally need a SoC or dedicated display controller that natively supports MIPI, which isn't always available on low-cost microcontrollers.
RGB (parallel): simple, proven, pin-hungry
RGB interfaces send color data on parallel lines directly from a controller to the panel. It's straightforward to drive from many MCUs and well-understood by firmware teams, which is why it remains common on small-to-mid TFT panels used in industrial HMIs and consumer electronics. The downside is pin count — 16 to 24+ signal lines eat into your PCB routing budget, especially on compact designs.
LVDS: the workhorse for mid-to-large panels
LVDS (Low-Voltage Differential Signaling) trades some pin count for signal integrity over longer distances, making it the standard choice once panels get into the 7"+ industrial and 10"+ tablet/laptop range. If your enclosure requires the display to sit some distance from the driver board — common in kiosks, HMI panels, and portable monitors — LVDS handles that cable run more reliably than parallel RGB.
SPI: minimal pins, minimal everything else
SPI is the go-to for very small displays — wearables, simple status indicators, basic instrument panels — where refresh rate and resolution demands are modest. Four to six pins total makes it the easiest interface to integrate on cost-sensitive, low-pin-count microcontrollers, but it's not suitable for video or fast-updating UI.
How to decide
Ask these three questions in order:
- What's driving the display? A smartphone-class SoC almost always means MIPI. A basic MCU with limited pins often points to SPI. Everything in between is where RGB and LVDS compete.
- How far is the panel from the driver board? Short, on-PCB connections favor RGB. Any meaningful cable run favors LVDS.
- What's your resolution and refresh-rate need? High-res, fast-updating content needs MIPI or LVDS. Simple, low-refresh UI can live on RGB or SPI.
Not sure which interface fits your driver board? Send us your controller and target resolution and we'll confirm compatible panel options.