Supports "Segmented Panel Display" architecture, which splits the screen into 2 or 4 independent segments to enable thinner and lighter panel designs. Display Stream Compression (DSC):
: Compared to older standards like LVDS, eDP 1.4 uses fewer wires (as few as 5 signals total), which allows for thinner laptop hinges and reduced electromagnetic interference (EMI).
| 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 |
: A protocol used to optimize power transitions between active and sleep states for the display interface. Multi-SST Architecture
The specification, in its infinite wisdom and strict adherence to protocol, mandated a specific timing delay between the EDP_MAIN_PWR_EN signal and the BACKLIGHT_EN signal. It was buried in a footnote on page 184, a sentence that most junior engineers probably skimmed over while looking for the definition of the DPCD registers.
On his screen, glowing like a holy relic, was the file: VESA_EDP_1.4_Specification.pdf .