OverviewThis document covers the new feature for the DisplayLink DL-4xxx series available from DisplayLink driver release 8.1 Alpha as a preview. From the general release 8.1 M0, any user will be able to change brightness and contrast on USB monitors using any utility complying with the DDC/CI standard. This allows users to use a single application to change brightness and contrast on all their displays, either connected through any DisplayLink product, or to a standard computer graphics card.
DDC/CI stands for Display Data Channel / Command Interface and is a standard protocol for monitors to exchange with computers.
Description on How to Use the FeatureAny utility implementing DDC/CI and not restricted to a particular other brand of monitor can be used with the DisplayLink DL-4xxx series, and all other DisplayLink shipping products. Because it is not attached to a particular manufacturer and it implements DDC/CI appropriately, we will be using the mature ScreenBright freeware in this guide. You can however use another tool, including your own. ScreenBright also has the advantage of being a small portable executable which can be used via a command line or through a graphical user interface (GUI).
- Download ScreenBright 0.2.5 from your preferred freeware distribution website,
- Run Screenbright.exe to start the application,
- If you have multiple monitors, select which monitor you wish to adapt by clicking on the appropriate tab,
- Adjust the brightness and/or contrast slider.