Edp 1.4 Specification Pdf ((new)) Now
Frequently required up to 20 to 30 pins to drive a standard 1080p display due to parallel differential clock and data line pairings.
Allows the display panel to maintain a static image using a local frame buffer built into the timing controller (TCON). When the onscreen content is idle (e.g., viewing a document or a static webpage), the GPU can enter a low-power sleep state, and the eDP Main Link can be turned off entirely.
The 1.4 revision introduces several advanced features optimized for mobile systems where battery life and display performance are critical metrics. 1. Panel Self-Refresh (PSR) and PSR2 Panel Self-Refresh is a cornerstone power-saving feature.
For testing and compliance, documentation can be found in technical datasheets like this Keysight eDP 1.4 electrical performance PDF . Conclusion
, by introducing the HBR3 link rate (8.1 Gbps per lane). It also integrated Display Stream Compression (DSC) 1.1 edp 1.4 specification pdf
eDP 1.4 refines the ability to dynamically change the display's refresh rate to match the frame rate of the content. For example, if a video is playing at 24 frames per second (fps), the display drops its refresh rate to 24Hz, eliminating judder and saving power compared to forcing a standard 60Hz refresh rate. Architectural Comparison: eDP 1.3 vs. eDP 1.4 5.4 Gbps per lane (HBR2) 5.4 Gbps per lane (HBR2) Compression Not supported VESA DSC 1.1 Integrated Panel Self-Refresh Basic PSR (Full frame only) PSR2 (Selective/Partial frame update) Power Management Standard Link Standby Advanced Link Power Management (ALPM) Display Segmenting Single display stream Multi-SST Operation (MSO) Why Engineers Need the Official PDF Specification
eDP 1.4 supports DSC 1.1, which enables visually lossless compression. This allows for higher resolutions (like 4K and 5K) over fewer wires.
The eDP 1.4 specification remains a foundational standard in display technology, striking a perfect balance between performance and efficiency. By mastering its core features—such as PSR2, DSC, and ALPM—designers can build devices that deliver breathtaking visual experiences without compromising on battery longevity. If you are currently implementing this interface, Share public link
1 to 4 pairs of low-voltage differential signaling (LVDS) lines for video data. Frequently required up to 20 to 30 pins
Instead of the GPU sending 60 full frames every second to the screen, eDP 1.4 can tell the display to "remember" the static image. If only the mouse cursor moves, the GPU only sends the data for those few pixels. This efficiency is why modern Ultrabooks can achieve 12+ hours of video playback. 📑 How to Access the Official PDF
Added Display Stream Compression (DSC) 1.1 and the Multi-SST Operation (MSO) architecture to support resolutions up to 8K.
Enables 4K (3840x2160) and QHD+ resolutions at 60Hz or higher while preserving battery life during office productivity tasks.
eDP 1.4 introduces a Multi-SST Architecture to support displays that are internal "tiled" panels. This allows the GPU to drive a single ultra-high-resolution screen as multiple independent logical displays over a single physical interface. This capability proved critical for early mobile 4K panels. 3. Display Stream Compression (DSC) For testing and compliance, documentation can be found
Using 4 lanes locked at the HBR2 speed of 5.40 Gbps, the raw interface bandwidth is calculated as:
High-resolution panels can be supported with fewer lanes, reducing costs and power.
In the world of laptops and tablets, the display is often the largest consumer of power. eDP 1.4 addresses this through .
