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| eDP 1.5 adds updates to extend PC battery life |
The Video Electronics Standards Association (VESA) published the eDP 1.5 Standard DisplayPort, the next version after 1.4b in 2015.
eDP 1.5 retains all the key features of the previous specification, adding additional features and performance that extend laptop battery life and enable smooth video playback on an adaptively sync-enabled display.
In devices such as laptop computers with built-in displays, an eDP is an electrical interface that transmits video data from the system's graphics hardware to the internal display.
EDP is often used for larger, higher resolution screens because it uses a lower number of lines and lower EMI to provide the highest resolution, refresh rate, and color depth.
Thanks to contributions from major hardware manufacturers through VESA, the eDP standard has been continuously improved since its inception more than 10 years ago.
Like the previous specification version, eDP 1.5 supports automatic map updating, an important power-saving feature of the standard.
Through the self-regeneration of the circuit board, the static image of the screen is saved in the display memory and the rest of the system enters the standby state with low power consumption. The system can wake up temporarily if necessary to refresh all or part of the screen.
This means that when the GUI is inactive, the GPU is disconnected from the screen, providing additional power. It also gives the GPU the ability to sleep and use less power.
Current GPUs only operate at idle frequencies when idle. It cannot sleep without losing the video signal, which is different from the processor core.
eDP 1.5 extends laptop battery life
Added a function to turn off the screen itself during normal operation (when not using the automatic update of the control panel). There is also additional protocol support for OLED panels to improve the energy savings and lifespan of these displays.
The next major addition is adaptive sync support for movie and video playback. A monitor that supports eDP 1.5 can adjust its frame rate to match the frame rate of the video being played to reduce frame rate and skip frames.
For gaming monitors with a high refresh rate, new mechanisms have been added to reduce screen flicker.
The eDP standard is very different from the DisplayPort standard, which is known from standard monitors and graphics cards.
eDP is suitable for devices such as tablets, laptops, and portable game consoles. The screen is built directly into the device.
eDP has added some features and functions to improve communication between the built-in display and its associated devices. This is not possible with normal DisplayPort.
One of the functions of eDP is to directly operate the backlit LCD panel. This can be done without additional power output or input.
As a result, not all of the features added in eDP 1.5 have been added to regular DisplayPort monitors and GPUs.