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What is eDP display interface | Advantages of eDP interface

This page covers eDP display interface basics used for image transfer. It mentions benefits or advantages of eDP interface.

Introduction : There are various common display interfaces viz. LVDS, RGB, MIPI, Vx1 and eDP used for image transfer. We will understand eDP interface basics, its merits and demerits.

What is eDP display interface ?

It is introduced in 2009 by Video Electronics Standards Association (VESA). It is implemented in LCD TFT display based consumer electronic devices. It has many benefits over LVDS interface and hence it is called new LVDS. Latest Intel and AMD processors are available with eDP interface as native display interface. It is widely used in notebooks.

eDP supports LCD TFT displays with 3840 x 2160 px with 60FPS/24bpp, 1920 x 1080 px with 240 FPS/24bpp and 2650x1600 with 60FPS/48bpp. It supports resolution graphics up to 8K.

eDP display interface

eDP interface supports differential pair of signals. One pair is used for clock and the other pair is used for data. Half duplex AUX channels are used to configure LCD TFT controllers. eDP structure is similar to LVDS interface but it has different packaging for information transfer.

eDP image transfer interface uses following modes of data synchronization.
VSYNC : Vertical Synchronization
HSYNC : Horizontal Synchronization
DE : Data Enable

Benefits or advantages of eDP interface

Following are the benefits or advantages of eDP interface:
➨It requires less signal wires compare to LVDS.
➨It supports higher data rate with bandwidth up to 1.62 GB/s.
➨It is relatively resistant to EMI (Electromagnetic Interference).
➨It is compatible with sub-micron chip processes.
➨It supports advanced power saving features.

Refer advantages and disadvantages of following interface protocols.
RGB,   Vx1,   UART,   SPI,   I2C,   I2S,   Serial interface,   Parallel interface



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