eDP (Embedded DisplayPort) is an integrated DisplayPort interface – a video transmission standard developed by VESA for connecting a graphics controller to an embedded display in devices such as laptops, all-in-one computers, industrial PCs or HMI panels. Compared to standard DisplayPort, eDP is optimized for internal integration – it uses fewer signal lines, supports low-power modes, refresh rate control (Panel Self-Refresh) and dynamic backlight adjustment, resulting in lower power consumption and thinner designs.
The eDP standard can carry very high-resolution images and color depth, and it also supports HDR and high refresh rates, making it a common choice in modern TFT LCD and OLED displays where high image quality, energy efficiency and slim profile are important.
How does eDP work?
eDP uses the same packet-based transport as DisplayPort. Video travels over one, two or four main-link lanes with an embedded clock, while a separate auxiliary channel (AUX) handles configuration: the source reads the panel’s capabilities and EDID, trains the link to the best lane count and rate, and controls power-saving features. Because the clock is recovered from the data, eDP needs fewer wires than LVDS for the same resolution.
The standard is designed for displays built into a device – laptops, all-in-one PCs, tablets and panel PCs – and adds features that external DisplayPort does not need, such as Panel Self-Refresh (PSR): the panel keeps showing a static image from its own memory while the graphics controller powers down the link.
eDP vs LVDS
| eDP | LVDS | |
|---|---|---|
| Lines for Full HD | Typically 2 lanes (4 wires) + AUX | Dual channel: 10 pairs (20 wires) |
| Clock | Embedded in the data | Separate clock pair |
| Configuration | AUX channel and link training | None – fixed timing from the datasheet |
| Power saving | Panel Self-Refresh, low-power states | Limited |
| Typical use | New laptops, panel PCs, high-resolution panels | Industrial TFTs, long-lived products |
What to check when choosing an eDP display
- eDP version and supported link rates (e.g. RBR, HBR, HBR2) on both the source and the panel.
- Number of lanes the panel expects at its native resolution and refresh rate.
- Connector type and pinout – many panels use 30- or 40-pin micro-coax connectors, and pin assignments differ between manufacturers.
- Backlight power and control – often separate enable and PWM signals on the same connector.
- Cable length – eDP is meant for short internal connections.
