This allows the display to sync its refresh rate with the GPU's output, reducing stuttering in gaming and saving power during low-motion tasks. Technical Evolution to 1.4a The 1.4 specification laid the groundwork for , released in 2015. This update leveraged the VESA DisplayPort 1.3 standard to support even higher resolutions, such as
Released by VESA in 2013, the Embedded DisplayPort (eDP) 1.4 standard enhances power efficiency and supports higher display resolutions for mobile devices through key features like Panel Self Refresh (PSR) with selective update and Display Stream Compression (DSC). It provides up to 25.92 Gbps total bandwidth, allowing for reduced voltage and power consumption up to 75% compared to previous iterations. For more details on the features of this standard, visit VESA www.displayport.org.
It comfortably drives 4K resolution at 60Hz with 10-bit color depth using a minimal wire count, and can scale even higher when compression technologies are applied. Breakthrough Features for Power Efficiency
Engineers, system designers, and hardware enthusiasts frequently search for the to understand the exact electrical, logical, and protocol parameters required to implement this standard. This article provides a comprehensive overview of the eDP 1.4 standard, its core features, technical improvements over previous versions, and architectural impact. Core Features of eDP 1.4 edp 1.4 specification pdf
If you'd like to get a hold of the EDP 1.4 specification PDF, you can try the following:
Compression enables thinner screen bezels and tighter hinge designs, as fewer physical copper lines need to pass from the motherboard through the hinge to the display panel.
across four lanes. This supports resolutions up to 8K at 60Hz or 4K at 120Hz. Panel Self-Refresh (PSR2): An evolution of original PSR, PSR2 adds Selective Update This allows the display to sync its refresh
This feature allows the display to be driven by multiple data "lanes" simultaneously, supporting higher refresh rates and ultra-thin bezels.
| Feature | eDP 1.4 (Embedded) | DP 1.4 (External) | | :--- | :--- | :--- | | | Internal laptop/tablet panels | Monitors, TVs, Projectors | | Connector | Custom internal board-to-board | Standard DisplayPort Connector | | DSC Support | Not mandatory in base 1.4 spec | Mandatory (Display Stream Compression 1.2) | | PSR | Native support for battery saving | Not typically used |
The complete, unedited contains highly confidential electrical compliance parameters, register maps, and timing diagrams intended for hardware design engineers. It provides up to 25
A 3.3V signal indicating to the GPU that the display panel is powered and active.
: In a standard system, the GPU continuously transmits frame data to the display panel 60 times a second, even if the image is completely static (like reading an article or viewing a photo).
The eDP 1.4 specification was a landmark achievement that successfully bridged the gap between high-performance external DisplayPort standards and the unique power and form-factor requirements of embedded devices. By introducing innovations like HBR3, DSC, and PSR, it enabled the modern era of high-resolution, battery-efficient laptops and tablets.