LED Display Dimming

For maximum effectiveness, a display must have the capability to adjust brightness levels for correct intensity and high contrast according to ambient light conditions during any time of day. At night, during lower light conditions, a display that is too bright due to inadequate adjustment may be worse that a display that is too dim. An overly bright display can be distracting and difficult to read, which can damage market acceptance and result in stricter sign codes.

A good display control system should have multiple dimming control methods including: automatic dimming as determined by ambient light conditions, scheduled dimming that can be preset to adjust at scheduled time and manual dimming that instantly adjust the brightness. Scheduled dimming is required when an auto dimming system must be overridden to meet certain conditions or as sign codes require.