DDC/CI Support & Definition

Digital View LCD controller boards typically support a subset of DDC/CI commands. These commands enable the graphics card to send commands to the LCD controller to adjust the settings for the display. For a definition of DDC/CI please see the note at the end.

The DDC/CI commands are supported over VGA, DVI, HDMI and DisplayPort. The following Digital View controllers have DDC/CI support implemented:

  • ALR-1920 and ALT-1920: Compact multi-input controller boards.
  • DD-1920 and DT-1920-HDMI: Designed for higher volume display applications.

Functions supported: It is important to refer to the manual for the specific model LCD controller to see which commands are supported, they are likely to be one or more of the following:

  • Brightness
  • Contrast
  • RGB color
  • Input source
  • Input Source (VGA, HDMI & Displayport)
  • Color Temperature
  • Red/Green/Blue Gain for user setting
  • Volume
  • Load factory default setting
  • Power states:
    • On = Always on, displays “No sync” if no input signal.
    • Standby = Power off to the panel and backlight.
    • Sleep = “No sync” message displayed for 10 seconds then backlight off.

Other Digital View LCD controller board models have the capability for DDC/CI command support so that firmware modification can enable specific commands, these models include:

  • SVX-4096, SVX-4096-120, SVX-4096-VW
  • SP-4096
  • SVX-2560
  • SVX-1920v3
  • SVH-1920v2
  • ALR-1920-120, ALR-1920-SDI

DDC/CI Definition

What is DDC/CI? DDC stands for Display Data Channel / Command Interface and refers to a set of commands defined by VESA that pass between a monitor and graphics card to communicate settings. These are in addition to the video signal itself. The /CI (Command Interface) extension refers to an update to the standard for bi-directional communication, ie the monitor can report back to the graphics card.

If you have any questions regarding this function or any of our controllers please contact us.

VGA ddc/ci

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