Edid Introduction - Optoma EX542 Service Manual

Chapter 6
EDID Upgrade

6-1 EDID Introduction

Extended Display Identification Data is a VESA standard data format that contains basic
information about a display device and its capabilities, including vendor information,
maximum image size, color characteristics, factory pre-set timings, frequency range limits,
and character strings for the monitor name and serial number.
The information is stored in the display and is used to communicate with the system
through a Display Data Channel (DDC), which sites between the display device and the
PC graphics adapter. The system uses this information for configuration purposes, so the
monitor and system can work together.
Note: - If a display device has digital input ports, like DVI or HDMI, but without EDID in its Main
Board, the display device will show no image while the input source is digital signal.
- The EDID Upgrade procedure for EX615/EX612/EX542/EX540/EX762/EX540I/EX542I is
the same, we take EX542 as an example here.
- The EDID Upgrade procedure for ES523ST/EW533ST is the same, we take ES523ST as
an example here.
EX540/EX542/EX612/EX615/EX762/EX540I/EX542I/ES523ST/EW533ST Confidential
6-1